The Poprad Economic and Management Forum 2021. International Scientific Conference. The Poprad Economic and Management Forum 2021 : Conference Proceedings from International Scientific Conference. Editors: Peter Madzík, Mária Janošková. 1. vydanie. Ružomberok : VERBUM - vydavateľstvo Katolíckej univerzity v Ružomberku, 2021. 572 s. Available on Internet: <https://www.manazmentpp.sk/wp-content/uploads/2021/10/PEMF_2021_Proceedings_v19.a.pdf> ISBN 978-80-561-0888-8.