Ye shall Know them by their Verbs: How Gender Express their Opinion in Twitter. - Madai Ramírez; Octavio Sánchez-Velázquez (Res. Comput. Sci., 2016)

Let's Agree to Disagree: Measuring Agreement between Annotators for Opinion Mining Task. - Octavio Sánchez-Velázquez; Gerardo Sierra (Res. Comput. Sci., 2016)

A Machine Learning Approach for Detecting Aggressive Tweets in Spanish. - Helena Gómez-Adorno; Gemma Bel Enguix; Gerardo Sierra; Octavio Sánchez; Daniela Quezada (IberEval@SEPLN, 2018)

Joint Sentiment Topic Model for objective text clustering. - Octavio Sánchez; Gerardo Sierra (J. Intell. Fuzzy Syst., 2019)