Davoudi Monfared M., and Darafsheh M.R. “A Characterization of the Groups PSU/(4,4) and PSL(4, 4) by Non-Commuting Graph”. Utilitas Mathematica 81 (May 9, 2010). Accessed May 8, 2026. https://utilitasmathematica.com/index.php/Index/article/view/719.