Dovbnyak, T.S. “Applications of Parafunctions of the Triangle $(0,1)$-Matrices to Finding the Number of Graphs Connectivity”. Carpathian Mathematical Publications 3, no. 2 (December 29, 2011): 57–63. Accessed November 22, 2024. https://ktipe.pnu.edu.ua/index.php/cmp/article/view/3065.