Srutha Keerthi, B., and M. Revathi. “On Certain New Subclass of Sakaguchi Type Function Related to Sigmoid Functions”. International Journal of Engineering & Technology 7, no. 4.36 (December 9, 2018): 766–768. Accessed April 28, 2024. https://sciencepubco.com/index.php/ijet/article/view/24238.