Cristofoli, Fulvio, Antonio Carlos Lago Junior, and Carlos Henrique Feitera. “Benefits from the VOIP Use: A Case Study at GM”. Review of Business Management 8, no. 21 (July 23, 2007): 55–69. Accessed March 4, 2025. https://rbgn.emnuvens.com.br/RBGN/article/view/61.