Rana, K., A. Niaz, S. Hanif, and M. Ali. “4x4 Bit Multiplier Designs Using Different CMOS Schematics, and Their Comparison”. Technical Journal, Vol. 24, no. 04, Jan. 2020, pp. 15-22, https://tj.uettaxila.edu.pk/index.php/technical-journal/article/view/1153.