DITCHEV, A. LEAST ENUMERATIONS OF UNARY PARTIAL STRUCTURES. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 101, p. 51–69, 2013. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/229. Acesso em: 15 nov. 2024.