SOKHATS’KYI, F. M. On the classification of functional equations on quasigroups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 9, p. 1259–1266, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3839. Acesso em: 14 apr. 2025.