JANKAJ, Frederik. Direct Investing in the Financial Market. In Marketing manažment, obchod, finančné a sociálne aspekty podnikania. Medzinárodná vedecká konferencia. Conference Proceeding of Research Papers of the 8th International Scientific Conference - Marketing Management, Trade, Financial and Social Aspects of Business - MTS 2023 : Košice (Slovakia) and Tarnobrzeg (Poland), September 21 -23, 2023. - Bratislava : Vydavateľstvo EKONÓM, 2023. ISBN 978-80-225-5088-8, pp. 277-285.