H. Kadhim Hoomod, I. Al-Mejibli, and A. Issa Jabboory, “Efficient Neighborhood Function and Learning Rate of Self-Organizing Map (SOM) for Cell Towers Traffic Clustering”, J. Al-Qadisiyah Comp. Sci. Math., vol. 9, no. 2, pp. Comp Page 122 – 130, Nov. 2017.