--- title: "Ivan Koychev — author profile and papers — Elamur Research" description: "Ivan Koychev, Sofia University \"St. Kliment Ohridski\": 2 papers on Elamur Research (2026), h-index 20 — affiliations, topics, co-authors and…" canonical: "https://research.elamur.ai/free/en/authors/ivan-koychev/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/authors/ivan-koychev/) [home](https://md.research.elamur.ai/free/en/) / [authors](https://md.research.elamur.ai/free/en/authors/) / Ivan Koychev # Ivan Koychev Ivan Koychev has 2 papers in our library, in 2026, most of them on [Named entity recognition](https://md.research.elamur.ai/free/en/topics/named-entity-recognition/), [Language models & pretraining](https://md.research.elamur.ai/free/en/topics/language-models/), [Multilingual & cross-lingual NLP](https://md.research.elamur.ai/free/en/topics/multilingual-nlp/); often with [Dimitar Iliyanov Dimitrov](https://md.research.elamur.ai/free/en/authors/dimitar-iliyanov-dimitrov/), [Preslav Nakov](https://md.research.elamur.ai/free/en/authors/preslav-nakov/), [Yuxia Wang](https://md.research.elamur.ai/free/en/authors/yuxia-wang/). 2 papers in our library · 2026 [OpenAlex](https://openalex.org/A5076908482) · [ORCID](https://orcid.org/0000-0003-3919-030X) · [**h-index 20**](https://openalex.org/authors/A5076908482) · [119 works](https://openalex.org/works?filter=author.id:A5076908482) · [1,474 citations](https://openalex.org/works?filter=author.id:A5076908482&sort=cited_by_count:desc) OpenAlex, 2026-10-14 [📄 2 works in our library](https://md.research.elamur.ai/free/en/authors/ivan-koychev/#papers) · [🔗 Cited 40 times in our library](https://md.research.elamur.ai/free/en/authors/ivan-koychev/cited-by/) · [3 more in our library without a page yet](#also) · [⭐ Paper Stars ranking: #11542](https://md.research.elamur.ai/free/en/paper-stars/page/116/#star-11542) The profile is the library's match of the name; two people with one name are not always told apart. Elsewhere: [Google Scholar](https://scholar.google.com/citations?view_op=search_authors&mauthors=Ivan+Koychev) · [Semantic Scholar](https://www.semanticscholar.org/search?q=Ivan+Koychev) · [dblp](https://dblp.org/search?q=Ivan+Koychev) · [ACL Anthology](https://aclanthology.org/search/?q=Ivan+Koychev) ## Affiliations [🎓**Sofia University "St. Kliment Ohridski"** Sofia · Bulgaria 2009–2026 · 89 papers*current*](https://md.research.elamur.ai/free/en/universities/sofia-university-st-kliment-ohridski/) · [🏛️**Bulgarian Academy of Sciences** Sofia · Bulgaria 2005–2023 · 5 papers](https://md.research.elamur.ai/free/en/government/bulgarian-academy-of-sciences/) · [🎓**Big Data for Smart Society (GATE) Institute** Sofia · Bulgaria 2021–2022 · 5 papers](https://ror.org/01d16s529) · [🎓**Hamad bin Khalifa University** Doha · Qatar 2016–2021 · 5 papers](https://md.research.elamur.ai/free/en/universities/hamad-bin-khalifa-university/) · [🔬**Institute of Mathematics and Informatics** Sofia · Bulgaria 2005–2011 · 4 papers](https://ror.org/01b5dy719) · [🎓**Robert Gordon University** Aberdeen · United Kingdom 2003–2004 · 3 papers](https://ror.org/04f0qj703) · [🎓**Sophia University** Tokyo · Japan 2014–2023 · 2 papers](https://ror.org/01nckkm68) · [🔬**Fraunhofer Institute for Applied Information Technology** Sankt Augustin · Germany 2000–2002 · 2 papers](https://ror.org/01ak24c12) 🏛️**Sofiski universitet Sveti Kliment Ohridski** Sofija · [Bulgaria](https://md.research.elamur.ai/free/en/countries/bulgaria/) 2006Employment since 2006 · Professor, Faculty of Mathematics and Informatics From the bylines of their papers (OpenAlex, 2026-10-14), ORCID and Wikidata; institutions on papers are matched by machine. 2 more institutions on single bylines are not listed. ## Fields, topics and concepts Of its works in our library, with the number of works on each. 📚 Shelves 8 The field of science this work belongs to (OpenAlex fields).[Artificial Intelligence · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/artificial-intelligence/) · [Computer Science · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/) · [Arts and Humanities · 1 work](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/) · [Biochemistry, Genetics and Molecular Biology · 1 work](https://md.research.elamur.ai/free/en/shelves/biochemistry-genetics-and-molecular-biology/) · [Language and Linguistics · 1 work](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/language-and-linguistics/) · [Molecular Biology · 1 work](https://md.research.elamur.ai/free/en/shelves/biochemistry-genetics-and-molecular-biology/molecular-biology/) · [Safety Research · 1 work](https://md.research.elamur.ai/free/en/shelves/social-sciences/safety-research/) · [Social Sciences · 1 work](https://md.research.elamur.ai/free/en/shelves/social-sciences/) 🧭 Topics 4 Research subjects and languages the work is about.[Multilingual & cross-lingual NLP · 1 work](https://md.research.elamur.ai/free/en/topics/multilingual-nlp/) · [Named entity recognition · 1 work](https://md.research.elamur.ai/free/en/topics/named-entity-recognition/) · [Bias, fairness & safety · 1 work](https://md.research.elamur.ai/free/en/topics/bias-fairness-safety/) · [Language models & pretraining · 1 work](https://md.research.elamur.ai/free/en/topics/language-models/) ## Works by year ### 2020s [**2026** 2 papers](https://md.research.elamur.ai/free/en/authors/ivan-koychev/year/2026/) ## Papers The most cited first (OpenAlex and our library). 1. **[Enigma at #SMM4H–HeaRD 2026: Leveraging Multilingual Pre-trained Models for Clinical Named Entity Recognition](https://md.research.elamur.ai/free/en/papers/vassileva-2026-enigma-smm4h-heard-2026-leveraging/)** *(2026 · 1 citation)* The paper describes the Enigma team's system for MultiClinNER, subtask 1 of the MultiClinAI shared task at SMM4H–HeaRD 2026. 2. **[Schützen: Evaluating LLM Safety in Bulgarian and German Contexts](https://md.research.elamur.ai/free/en/papers/georgiev-2026-sch-utzen-evaluating-llm-safety/)** *(2026)* Most LLM safety benchmarks are built for English or Chinese and usually test other languages one at a time. ## All works 5 works of theirs in our library, the most cited first; 2 with a page here, the others link their original until we summarise them. 1. **[Fact-Checking Meets Fauxtography: Verifying Claims About Images ↗](https://aclanthology.org/D19-1216/) Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP) · no summary yet**Dimitrina Zlatkova, Preslav Nakov, Ivan Koychev*2019 · 119 citations* 2. **[Enigma at #SMM4H–HeaRD 2026: Leveraging Multilingual Pre-trained Models for Clinical Named Entity Recognition](https://md.research.elamur.ai/free/en/papers/vassileva-2026-enigma-smm4h-heard-2026-leveraging/) [Social Media Mining for Health Research and Applications Workshop and Shared Tasks](https://md.research.elamur.ai/free/en/venues/smm4h/)**Sylvia Vassileva, Plamena Ilieva, Teodor Svetoslavov Kostadinov, et al.*2026 · 1 citation* 3. **[EurLexSummarization – A New Text Summarization Dataset on EU Legislation in 24 Languages with GPT Evaluation ↗](https://aclanthology.org/2024.clib-1.22/) Proceedings of the Sixth International Conference on Computational Linguistics in Bulgaria (CLIB 2024) · no summary yet**Valentin Zmiycharov, Todor Tsonkov, Ivan Koychev*2024 · 1 citation* 4. **[A Comparative Study on Abstractive and Extractive Approaches in Summarization of European Legislation Documents ↗](https://aclanthology.org/2021.ranlp-1.184/) Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2021) · no summary yet**Valentin Zmiycharov et al.*2021 · 1 citation* 5. [**Schützen: Evaluating LLM Safety in Bulgarian and German Contexts arXiv:2606.11316**Kiril Georgiev, Yuxia Wang, Dimitar Iliyanov Dimitrov, et al.*2026*](https://md.research.elamur.ai/free/en/papers/georgiev-2026-sch-utzen-evaluating-llm-safety/) ## Co-authors here 3 co-authors with a page, the most papers together first. - [Dimitar Iliyanov Dimitrov](https://md.research.elamur.ai/free/en/authors/dimitar-iliyanov-dimitrov/) - [Preslav Nakov](https://md.research.elamur.ai/free/en/authors/preslav-nakov/) - [Yuxia Wang](https://md.research.elamur.ai/free/en/authors/yuxia-wang/) ## Venues Where their works here were published, the most works first, with the editions of those that have a page. - [Annual Meeting of the Association for Computational Linguistics (ACL)](https://md.research.elamur.ai/free/en/venues/acl/) - [Social Media Mining for Health Research and Applications Workshop and Shared Tasks](https://md.research.elamur.ai/free/en/venues/smm4h/): [Social Media Mining for Health Research and Applications Workshop and Shared Tasks 2026](https://md.research.elamur.ai/free/en/venues/smm4h/2026/) - Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP) - Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2021) - Proceedings of the Sixth International Conference on Computational Linguistics in Bulgaria (CLIB 2024) ## Cited by Papers of our library cite their works 40 times (of the 149,439 papers whose bibliographies we read); [11 citing papers with a page here →](https://md.research.elamur.ai/free/en/authors/ivan-koychev/cited-by/). Updated 31 October 2026