Spectrum Occupancy of Cellular Networks in Pakistan for Cognitive Radio — Measurements using Spectrum Analyzer . International Journal of Information and Electronics Engineering, [S. l.], v. 6, n. 1, p. 26–31, 2016. Disponível em: https://www.ijiee.org/index.php/ijiee/article/view/305. Acesso em: 19 may. 2026.