Sameer Saxena, Yudhveer Singh, Basant Agarwal. “Comparative Analysis of Noise Reduction in Complex Mammogram Images Using Filters: A Preprocessing Stage”. International Journal of Advanced Science and Technology, Vol. 29, no. 04, June 2020, pp. 6344 -58, http://sersc.org/journals/index.php/IJAST/article/view/27327.