Kolyvas, G., Logaras, C., Kotsifakos, D., & Douligeris, C. (2024). Difficulties and Problems in the Implementation Phase of an Open Online Personalized Learning Environment for Vocational Education and Training for the Covid-19 period. Journal of Integrated Information Management, 6(2), 21–27. Retrieved from https://ejournals.epublishing.ekt.gr/index.php/jiim/article/view/37895