Armakolas, Stefanos, Athina Kazana, i Maria Mitroulia. 2020. „Distance Sustainable Education. Incentives and Expectations”. Journal of Education, Technology and Computer Science, ISSN 2719-6550, e-ISSN 2719-7417 31 (1):9-18. https://doi.org/10.15584/jetacomps.2020.1.1.