R. Rajkumar, M. Gayathri, and T. Anitha. “Enumeration of Homomorphisms From Modular Group into Some Finite Groups”. International Journal of Mathematics And its Applications 3, no. 3 - B (October 1, 2015): 15–19. Accessed July 3, 2024. https://ijmaa.in/index.php/ijmaa/article/view/452.