VISHAL VINCENT HENRY; SWAPNIL SRIVASTAVA; AJIT PAUL. Group Extension Through c-left Groupoid. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 4 - D, p. 561–564, 2017. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1307. Acesso em: 22 jul. 2024.