PARK, C. SQUARE ROOT AND 3RD ROOT FUNCTIONAL EQUATIONS IN C^*-ALGEBRAS:. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), [S. l.], v. 2, n. 1, p. 27–34, 2011. Disponível em: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2611. Acesso em: 2 sep. 2026.