Cognitive Radio Networks for Optimized Spectrum Utilization. International Journal of Engineering & Extended Technologies Research (IJEETR), [S. l.], v. 3, n. 2, p. 2764–2768, 2021. DOI: 10.15662/IJEETR.2021.0302001. Disponível em: https://www.ijeetr.com/index.php/ijeetr/article/view/23. Acesso em: 5 dec. 2025.