Zawacki-Richter, Olaf, Dianne Conrad, Aras Bozkurt, Cengiz Hakan Aydin, Svenja Bedenlier, Insung Jung, Joachim Stöter, et al. 2020. “Elements of Open Education: An Invitation to Future Research ”. The International Review of Research in Open and Distributed Learning 21 (3):319-34. https://doi.org/10.19173/irrodl.v21i3.4659.