CHEN, R. .; ZHAO, X. .; LI, R. . On $\mathcal{M}$-normal embedded subgroups and the structure of finite groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 127, n. 2, p. 243–251, 2021. DOI: 10.7146/math.scand.a-126034. Disponível em: https://www.mscand.dk/article/view/126034. Acesso em: 19 sep. 2021.