LIU, Z.; KANG, S. M. On properties of solutions for a functional equation. Topological Methods in Nonlinear Analysis, [S. l.], v. 46, n. 1, p. 113–133, 2015. DOI: 10.12775/TMNA.2015.040. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2015.040. Acesso em: 3 jul. 2024.