On evaluating online teaching and learning experience: A usability evaluation study of synchronous teaching platforms. - Nikolaos Bourgos; Aigli Chroni; Maria Kounalaki; Eirini Papadopoulou; Alexandros Skarmitzos; Aggeliki Triantafilli; Iro Zagota; Christos Sintoris; Nikolaos M. Avouris (CHI Greece, 2021)