SARAJLIJA, E. ECONOMIC IMPACT ON OPTICAL COMMUNICATIONS AND PRINCIPLE OF BILLING SERVICES. NIR, [S. l.], v. 1, n. 14, p. 61, 2018. DOI: 10.59417/nir.2018.14.61. Disponível em: http://nir-casopis.org/index.php/nir/article/view/122. Acesso em: 10 mar. 2025.