Lepovic, Mirko.
"On Strongly  Regular  Graphs with m2 = qm3 AND m3 = qm2 FOR q = 7 2; 7 3; 7 4; 7 5; 7 6." <em>Yugoslav Journal of Operations Research</em> [Online], 31.3 (2021): 373-388. Web. 17 May. 2024