FERNANDES-PEREIRA, Aurelio. A Review of Customer Relationship Management Systems. International Journal on Research and Development - A Management Review, [S. l.], v. 11, n. 2, p. 146–150, 2022. DOI: 10.65521/ijrdmr.v11i2.1800. Disponível em: https://journals.mriindia.com/index.php/ijrdmr/article/view/1800. Acesso em: 24 jul. 2026.