SITARAMAN, M. A. Symmetrizing elements of the kernel to characterize the solvability of the σ+ Lights Out puzzle on various geometrical arrangements. Minnesota Journal of Undergraduate Mathematics, Minneapolis, MN, v. 2, n. 1, 2016. Disponível em: https://pubs.lib.umn.edu/index.php/mjum/article/view/4127. Acesso em: 18 may. 2024.