KVÍTKOVÁ, Zuzana; PETRU , Zdenka. Vouchers as a Result of Corona Virus and the Risks for Tour Operators and Consumers. Mednarodno inovativno poslovanje = Journal of Innovative Business and Management, Ljubljana, SI, v. 13, n. 1, p. 60–66, 2021. DOI: 10.32015/JIBM/2021.13.1.65-71. Disponível em: https://journal.doba.si/jimb/article/view/2021.13.1.65-71. Acesso em: 12 mar. 2026.