NASHINE, Hemant Kumar Kumar; KADELBURG, Zoran. Weaker cyclic (phi,phi)-contractive mappings with an application to integro-differential equations. Nonlinear Analysis: Modelling and Control, [S. l.], v. 18, n. 4, p. 427–443, 2013. DOI: 10.15388/NA.18.4.13971. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/13971. Acesso em: 26 apr. 2025.