Innovative Educational Technologies, Tools and Methods for E-learning : 12th Annual International Scientific Conference Theoretical and Practical Aspects of Distance Learning (DLCC 2020). Katowice-Cieszyn, Poland. October 12-13, 2020. Katowice : Studio Noa for University of Silesia, 2020. 335 s. E-learning, Vol. 12. ISBN 978-83-66055-19-3.