Kvítková, Z. and Petru , Z. 2021. Vouchers as a Result of Corona Virus and the Risks for Tour Operators and Consumers. Mednarodno inovativno poslovanje = Journal of Innovative Business and Management. 13, 1 (Jun. 2021), 60–66. DOI:https://doi.org/10.32015/JIBM/2021.13.1.65-71.