A. Taghavi, J. C. Ferreira, and M. . das G. Marietto, “Mappings preserving sum of products a◊b + b*a (resp., a*◊b + ab*) on ∗-algebras”, Proyecciones (Antofagasta, On line), vol. 42, no. 1, pp. 18-31, Jan. 2023.