ICETA ICETA 2021 : 19th IEEE International Conference on Emerging eLearning Technologies and Applications : Information and communication technologies in learning. Košice, Slovakia. November 11-12, 2021 / zost. František Jakab. -- Danvers : IEEE, 2021. -- ISBN : 978-1-6654-2102-7. -- 978-1-6654-2101-0 (USB). -- CFP2138M-USB. Jakab, František