Linear Maps Preserving Idempotency of Products of Matrices on Upper Triangular Matrix Algebras. Communications in Mathematical Research, [S. l.], v. 25, n. 3, p. 253–264, 2021. Disponível em: https://www.global-sci.com/index.php/cmr/article/view/8619. Acesso em: 6 dec. 2025.