Sušinskas, Jurgis, and Juozas Juvencijus Mačys. “Factorial Formulae and Computer-Aided Research”. Lietuvos matematikos rinkinys 48, no. proc. LMS (December 21, 2008): 137–141. Accessed April 19, 2025. https://journals.vu.lt./LMR/article/view/18080.