Fejedelem, Štefan ICETA 2023 : 21st Year of International Conference on Emerging eLearning Technologies and Applications : Information and communication technologies in learning. Starý Smokovec, Slovakia. October 26-27, 2023 / zost. Štefan Fejedelem. -- Danvers : IEEE, 2023. -- 565 s. -- ISBN : 979-8-3503-7068-3. -- CFP2338M-USB.