Maryna CHORNA, Marta BARNA, Tetiana ANDROSOVA, Nataliia USHAKOVA and Iryna TUCHKOVSKA, “Assessment of Economic Security of The Tourism Sector Under the Influence of External and Internal Threats,” Proceedings of the 33rd International Business Information Management Association (IBIMA), ISBN: 978-0-9998551-2-6, 10-11 April 2019, Granada, Spain, p.8054-8063.