KACZMAREK, Tomasz; GROBELNY, Przemysław. How to fly to safety without overpaying for the ticket . Economics and Business Review, Poland, v. 9, n. 2, 2023. DOI: 10.18559/ebr.2023.2.738. Disponível em: https://journals.ue.poznan.pl/ebr/article/view/738. Acesso em: 3 apr. 2025.