Elements of open education: An invitation to future research von Zawacki-Richter, O, Conrad, D, Bozkurt, A, Aydin, CH, Bedenlier, S, Jung, I, Stöter, J, Veletsianos, G, Blaschke, LM, Bond, M, Broens, A, Bruhn, E, Dolch, C, Kalz, M, Kerres, M, Kondakci, Y, Marin, V, Mayrberger, K, Müskens, W, Naidu, S, Qayyum, A, Roberts, J, Sangrà, A, Loglo, FS, van Tryon, PJS, Xiao, J

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