PJANIĆ, K. On the Functional Equation $\boldsymbol{U}_{\boldsymbol{t}}\boldsymbol{+} \boldsymbol{U}_{\boldsymbol{-t}} = \boldsymbol{V}_{\boldsymbol{t}} \boldsymbol{+} \boldsymbol{V}_{\boldsymbol{-t}}$ in a Banach Space. Sarajevo Journal of Mathematics, [S. l.], v. 3, n. 2, p. 241–248, 2024. DOI: 10.5644/SJM.03.2.10. Disponível em: https://sjm.anubih.ba/index.php/sjm/article/view/393. Acesso em: 15 oct. 2024.