Tuan, Bui Anh, and Bao Vo. “Homology of Borel Subgroup of SL(2,\mathbb{F}_p)”. Science and Technology Development Journal 22, no. 3 (August 18, 2019): 308-313. Accessed February 25, 2020. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1225.