SU@PAN'2015: Experiments in Author Profiling. - Yasen Kiprov; Momchil Hardalov; Preslav Nakov; Ivan Koychev (CLEF (Working Notes), 2015)

In Search of Credible News. - Momchil Hardalov; Ivan Koychev; Preslav Nakov (AIMSA, 2016)

SUper Team at SemEval-2016 Task 3: Building a Feature-Rich System for Community Question Answering. - Tsvetomila Mihaylova; Pepa Gencheva; Martin Boyanov; Ivana Yovcheva; Todor Mihaylov; Momchil Hardalov; Yasen Kiprov; Daniel Balchev; Ivan Koychev; Preslav Nakov; Ivelina Nikolova; Galia Angelova (SemEval@NAACL-HLT, 2016)

Towards Automated Customer Support. - Momchil Hardalov; Ivan Koychev; Preslav Nakov (AIMSA, 2018)

Recursive Style Breach Detection with Multifaceted Ensemble Learning. - Daniel Kopev; Dimitrina Zlatkova; Kristiyan Mitov; Atanas Atanasov; Momchil Hardalov; Ivan Koychev; Preslav Nakov (AIMSA, 2018)

An Ensemble-Rich Multi-Aspect Approach Towards Robust Style Change Detection: Notebook for PAN at CLEF 2018. - Dimitrina Zlatkova; Daniel Kopev; Kristiyan Mitov; Atanas Atanasov; Momchil Hardalov; Ivan Koychev; Preslav Nakov (CLEF (Working Notes), 2018)

Tweety at SemEval-2018 Task 2: Predicting Emojis using Hierarchical Attention Neural Networks and Support Vector Machine. - Daniel Kopev; Atanas Atanasov; Dimitrina Zlatkova; Momchil Hardalov; Ivan Koychev; Ivelina Nikolova; Galia Angelova (SemEval@NAACL-HLT, 2018)

Beyond English-Only Reading Comprehension: Experiments in Zero-shot Multilingual Transfer for Bulgarian. - Momchil Hardalov; Ivan Koychev; Preslav Nakov (RANLP, 2019)

Machine Reading Comprehension for Answer Re-Ranking in Customer Support Chatbots. - Momchil Hardalov; Ivan Koychev; Preslav Nakov (Inf., 2019)

EXAMS: A Multi-subject High School Examinations Dataset for Cross-lingual and Multilingual Question Answering. - Momchil Hardalov; Todor Mihaylov; Dimitrina Zlatkova; Yoan Dinkov; Ivan Koychev; Preslav Nakov (EMNLP (1), 2020)

DIPS at CheckThat! 2021: Verified Claim Retrieval. - Simona Mihaylova; Iva Borisova; Dzhovani Chemishanov; Preslav Hadzhitsanev; Momchil Hardalov; Preslav Nakov (CLEF (Working Notes), 2021)

Cross-Domain Label-Adaptive Stance Detection. - Momchil Hardalov; Arnav Arora; Preslav Nakov; Isabelle Augenstein (EMNLP (1), 2021)

Detecting Abusive Language on Online Platforms: A Critical Analysis. - Preslav Nakov; Vibha Nayak; Kyle Dent; Ameya Bhatawdekar; Sheikh Muhammad Sarwar; Momchil Hardalov; Yoan Dinkov; Dimitrina Zlatkova; Guillaume Bouchard; Isabelle Augenstein (CoRR, 2021)

A Neighbourhood Framework for Resource-Lean Content Flagging. - Sheikh Muhammad Sarwar; Dimitrina Zlatkova; Momchil Hardalov; Yoan Dinkov; Isabelle Augenstein; Preslav Nakov (CoRR, 2021)

Generating Answer Candidates for Quizzes and Answer-Aware Question Generators. - Kristiyan Vachev; Momchil Hardalov; Georgi Karadzhov; Georgi Georgiev; Ivan Koychev; Preslav Nakov (CoRR, 2021)

Few-Shot Cross-Lingual Stance Detection with Sentiment-Based Pre-training. - Momchil Hardalov; Arnav Arora; Preslav Nakov; Isabelle Augenstein (AAAI, 2022)

Leaf: Multiple-Choice Question Generation. - Kristiyan Vachev; Momchil Hardalov; Georgi Karadzhov; Georgi Georgiev; Ivan Koychev; Preslav Nakov (ECIR (2), 2022)

CrowdChecked: Detecting Previously Fact-Checked Claims in Social Media. - Momchil Hardalov; Anton Chernyavskiy; Ivan Koychev; Dmitry Ilvovsky; Preslav Nakov (AACL/IJCNLP (1), 2022)

A Survey on Stance Detection for Mis- and Disinformation Identification. - Momchil Hardalov; Arnav Arora; Preslav Nakov; Isabelle Augenstein (NAACL-HLT (Findings), 2022)

A Neighborhood Framework for Resource-Lean Content Flagging. - Sheikh Muhammad Sarwar; Dimitrina Zlatkova; Momchil Hardalov; Yoan Dinkov; Isabelle Augenstein; Preslav Nakov (Trans. Assoc. Comput. Linguistics, 2022)

bgGLUE: A Bulgarian General Language Understanding Evaluation Benchmark. - Momchil Hardalov; Pepa Atanasova; Todor Mihaylov; Galia Angelova; Kiril Simov; Petya Osenova; Veselin Stoyanov; Ivan Koychev; Preslav Nakov; Dragomir Radev (ACL (1), 2023)

Diable: Efficient Dialogue State Tracking as Operations on Tables. - Pietro Lesci; Yoshinari Fujinuma; Momchil Hardalov; Chao Shang; Lluís Màrquez (ACL (Findings), 2023)

Enriched Pre-trained Transformers for Joint Slot Filling and Intent Detection. - Momchil Hardalov; Ivan Koychev; Preslav Nakov (RANLP, 2023)

Factual Confidence of LLMs: on Reliability and Robustness of Current Estimators. - Matéo Mahaut; Laura Aina; Paula Czarnowska; Momchil Hardalov; Thomas Müller; Lluís Màrquez (ACL (1), 2024)

DEM: Distribution Edited Model for Training with Mixed Data Distributions. - Dhananjay Ram; Aditya Rawal; Momchil Hardalov; Nikolaos Pappas 002; Sheng Zha (EMNLP, 2024)

Detecting Check-Worthy Claims in Political Debates, Speeches, and Interviews Using Audio Data. - Petar Ivanov; Ivan Koychev; Momchil Hardalov; Preslav Nakov (ICASSP, 2024)

Detecting Harmful Content on Online Platforms: What Platforms Need vs. Where Research Efforts Go. - Arnav Arora; Preslav Nakov; Momchil Hardalov; Sheikh Muhammad Sarwar; Vibha Nayak; Yoan Dinkov; Dimitrina Zlatkova; Kyle Dent; Ameya Bhatawdekar; Guillaume Bouchard; Isabelle Augenstein (ACM Comput. Surv., 2024)

Drinov Orthography for Post-OCR Correction dataset. - Angel Beshirov; Milena Dobreva; Dimitar Dimitrov 003; Momchil Hardalov; Ivan Koychev; Preslav Nakov (Zenodo, 2024)

Understanding and Improving Information Preservation in Prompt Compression for LLMs. - Weronika Lajewska; Momchil Hardalov; Laura Aina; Neha Anna John; Hang Su; Lluís Màrquez (CoRR, 2025)

Post-ocr text correction for Bulgarian historical documents. - Angel Beshirov; Milena Dobreva; Dimitar Dimitrov 003; Momchil Hardalov; Ivan Koychev; Preslav Nakov (Int. J. Digit. Libr., 2025)