Celebrity Profiling using TF-IDF, Logistic Regression, and SVM. - Victor Radivchev; Alex Nikolov; Alexandrina Lambova (CLEF (Working Notes), 2019)

Nikolov-Radivchev at SemEval-2019 Task 6: Offensive Tweet Classification with BERT and Ensembles. - Alex Nikolov; Victor Radivchev (SemEval@NAACL-HLT, 2019)

Overview of CheckThat! 2020: Automatic Identification and Verification of Claims in Social Media. - Alberto Barrón-Cedeño; Tamer Elsayed; Preslav Nakov; Giovanni Da San Martino; Maram Hasanain; Reem Suwaileh; Fatima Haouari; Nikolay Babulkov; Bayan Hamdan; Alex Nikolov; Shaden Shaar; Zien Sheikh Ali (CLEF, 2020)

Team Alex at CLEF CheckThat! 2020: Identifying Check-Worthy Tweets With Transformer Models. - Alex Nikolov; Giovanni Da San Martino; Ivan Koychev; Preslav Nakov (CLEF (Working Notes), 2020)

Overview of CheckThat! 2020 English: Automatic Identification and Verification of Claims in Social Media. - Shaden Shaar; Alex Nikolov; Nikolay Babulkov; Firoj Alam; Alberto Barrón-Cedeño; Tamer Elsayed; Maram Hasanain; Reem Suwaileh; Fatima Haouari; Giovanni Da San Martino; Preslav Nakov (CLEF (Working Notes), 2020)

Fighting the COVID-19 Infodemic: Modeling the Perspective of Journalists, Fact-Checkers, Social Media Platforms, Policy Makers, and the Society. - Firoj Alam; Shaden Shaar; Alex Nikolov; Hamdy Mubarak; Giovanni Da San Martino; Ahmed Abdelali; Fahim Dalvi; Nadir Durrani; Hassan Sajjad 001; Kareem Darwish; Preslav Nakov (CoRR, 2020)

Overview of the CLEF-2021 CheckThat! Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News. - Preslav Nakov; Giovanni Da San Martino; Tamer Elsayed; Alberto Barrón-Cedeño; Rubén Míguez; Shaden Shaar; Firoj Alam; Fatima Haouari; Maram Hasanain; Watheq Mansour; Bayan Hamdan; Zien Sheikh Ali; et al. (CLEF, 2021)

Overview of the CLEF-2021 CheckThat! Lab Task 1 on Check-Worthiness Estimation in Tweets and Political Debates. - Shaden Shaar; Maram Hasanain; Bayan Hamdan; Zien Sheikh Ali; Fatima Haouari; Alex Nikolov; Mücahid Kutlu; Yavuz Selim Kartal; Firoj Alam; Giovanni Da San Martino; Alberto Barrón-Cedeño; Rubén Míguez; et al. (CLEF (Working Notes), 2021)

The CLEF-2021 CheckThat! Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News. - Preslav Nakov; Giovanni Da San Martino; Tamer Elsayed; Alberto Barrón-Cedeño; Rubén Míguez; Shaden Shaar; Firoj Alam; Fatima Haouari; Maram Hasanain; Nikolay Babulkov; Alex Nikolov; Gautam Kishore Shahi; et al. (ECIR (2), 2021)

Fighting the COVID-19 Infodemic: Modeling the Perspective of Journalists, Fact-Checkers, Social Media Platforms, Policy Makers, and the Society. - Firoj Alam; Shaden Shaar; Fahim Dalvi; Hassan Sajjad 001; Alex Nikolov; Hamdy Mubarak; Giovanni Da San Martino; Ahmed Abdelali; Nadir Durrani; Kareem Darwish; Abdulaziz Al-Homaid; Wajdi Zaghouani; et al. (EMNLP (Findings), 2021)

Fighting the COVID-19 Infodemic in Social Media: A Holistic Perspective and a Call to Arms. - Firoj Alam; Fahim Dalvi; Shaden Shaar; Nadir Durrani; Hamdy Mubarak; Alex Nikolov; Giovanni Da San Martino; Ahmed Abdelali; Hassan Sajjad 001; Kareem Darwish; Preslav Nakov (ICWSM, 2021)

Findings of the NLP4IF-2021 Shared Tasks on Fighting the COVID-19 Infodemic and Censorship Detection. - Shaden Shaar; Firoj Alam; Giovanni Da San Martino; Alex Nikolov; Wajdi Zaghouani; Preslav Nakov; Anna Feldman (CoRR, 2021)

Overview of the CLEF-2022 CheckThat! Lab Task 1 on Identifying Relevant Claims in Tweets. - Preslav Nakov; Alberto Barrón-Cedeño; Giovanni Da San Martino; Firoj Alam; Rubén Míguez; Tommaso Caselli; Mücahid Kutlu; Wajdi Zaghouani; Chengkai Li 001; Shaden Shaar; Hamdy Mubarak; Alex Nikolov; et al. (CLEF (Working Notes), 2022)

Overview of the CLEF-2022 CheckThat! Lab on Fighting the COVID-19 Infodemic and Fake News Detection. - Preslav Nakov; Alberto Barrón-Cedeño; Giovanni Da San Martino; Firoj Alam; Julia Maria Struß; Thomas Mandl 001; Rubén Míguez; Tommaso Caselli; Mücahid Kutlu; Wajdi Zaghouani; Chengkai Li 001; Shaden Shaar; et al. (CLEF, 2022)

The CLEF-2022 CheckThat! Lab on Fighting the COVID-19 Infodemic and Fake News Detection. - Preslav Nakov; Alberto Barrón-Cedeño; Giovanni Da San Martino; Firoj Alam; Julia Maria Struß; Thomas Mandl 001; Rubén Míguez; Tommaso Caselli; Mücahid Kutlu; Wajdi Zaghouani; Chengkai Li 001; Shaden Shaar; et al. (ECIR (2), 2022)