O'BRIEN, Paul. Electronic Commerce, the Internet and Travel Cybermediaries. Australasian Journal of Information Systems, Australia, v. 6, n. 1, 1998. DOI: 10.3127/ajis.v6i1.319. Disponível em: https://ajis.aaisnet.org/index.php/ajis/article/view/319. Acesso em: 5 dec. 2025.