“…In this respect, research related to communication and collaboration involve formal online virtual environments for learning, managed by institutions (Schwier, 2012;Veletsianos & Navarrete, 2012), or informal ones, including MOOCs (Ebner, Lienhardt, Rohs, & Meyer, 2010;Razmerita, Kirchner, Hockerts, & Tan, 2019;Sanz-Martínez, Er, Martínez-Monés, Dimitriadis, & Bote-Lorenzo, 2019). In all these cases, the amount of available information and knowledge is much too great, the specialized online search requiring collaborative filtering recommender agent tools integrated in virtual collaborative learning environment, which should consider the students' learning styles (Dascalu et al, 2015).…”