Jaffar, J., S. K. S. Yusof, N. Ahmad, and J. Che Mustapha. “Location Assisted Proactive Channel in Heterogeneous Cognitive Radio Network”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 8, no. 3, June 2016, pp. 49-53, https://jtec.utem.edu.my/jtec/article/view/1001.