Н. Д. Гогин and А. А. Мюлляри, “On Computer Modeling of Finite-generated Free Projective Planes”, Computer Tools in Education, no. 4, pp. 14–28, Jul. 2017, Accessed: Sep. 15, 2026. Available: http://cte.eltech.ru/ojs/index.php/kio/article/view/1501