ZURAPOV, A. Challenges for income generation methods in monopoly companies. American Journal of Economics and Business Management, [S. l.], v. 2, n. 2, p. 54–64, 2019. DOI: 10.31150/ajebm.Vol2.Iss2.70. Disponível em: https://globalresearchnetwork.us/index.php/ajebm/article/view/70. Acesso em: 25 apr. 2024.