KARZEL, H. LOOPS RELATED TO REFLECTION GEOMETRIES. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 103, p. 33–38, 2016. Disponível em: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/50. Acesso em: 10 apr. 2025.