DEY, K. K.; PAUL, A. C. Generalized Derivations Acting as Homomorphisms and Anti-Homomorphisms of Gamma Rings. Journal of Scientific Research, [S. l.], v. 4, n. 1, p. 33, 2011. DOI: 10.3329/jsr.v4i1.7911. Disponível em: https://banglajol.info/index.php/JSR/article/view/7911. Acesso em: 20 may. 2022.