Othman, N. I., A. F. Ismail, M. K. Hasan, W. Hashim, and K. Badron. “Dynamic Spectrum Allocation Scheme for Heterogeneous Network: BER Analysis”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 3-10, Dec. 2017, pp. 99-104, https://jtec.utem.edu.my/jtec/article/view/3162.