GOŁEMBSKI, Grzegorz; ANDRZEJEWSKI, Maciej. The impact of electronic distribution channels on the tour operators market in Poland. Economics and Business Review, Poland, v. 6, n. 2, p. 5–24, 2006. DOI: 10.18559/ebr.2006.2.529. Disponível em: https://journals.ue.poznan.pl/ebr/article/view/529. Acesso em: 4 apr. 2025.