Exploring communities of inquiry in Massive Open Online Courses. - Vitomir Kovanovic; Srecko Joksimovic; Oleksandra Poquet; Thieme Hennis; Iva Cukic; Pieter de Vries; Marek Hatala; Shane Dawson; George Siemens; Dragan Gasevic (Comput. Educ., 2018)