Anagnostou, Panagiotis, and Nikolina Nikolova. “Evaluation of Experience of Distance-Learning That Was Provided by Greek Public Institutes of Vocational Training (PIVT) During the Pandemic COVID-19 Crisis”. Ann. Sofia Univ. Fac. Math. and Inf. 108 (December 12, 2021): 5–15. Accessed November 23, 2024. https://stipendii.uni-sofia.bg/index.php/fmi/article/view/553.