Hòa, Vũ Đình, and Đỗ Như An. “The Number Maximal Uniquely Hamiltonian Graph”. <i>Journal of Computer Science and Cybernetics</i> 22, no. 3 (June 23, 2012): 221–228. Accessed April 4, 2026. https://cip.vast.vn/jcc/article/view/1101.