SALIH, Salah Mahdi; SHAKER, Samah Jaber. Orthogonal Generalized Symmetric Higher bi-Derivations on Semiprime Г-Rings . Iraqi Journal of Science, [S. l.], v. 59, n. 2A, p. 711–723, 2018. Disponível em: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/276.. Acesso em: 8 dec. 2025.