ŠPILKA, Marián et al. Importance of recommendation system in modern forms of learning. In IWSSIP 2016 : 23th International conference on systems, signals and image processing. Bratislava, Slovakia. 23-25 May 2016. 1. vyd. Bratislava : Slovak University of Technology in Bratislava / IEEE, 2016, S. 221-224. ISBN 978-1-4673-9555-7. E*329/UT/2016