UGHADE, Manoj; SANODIA, P. L.; GUPTA, Arvind; PANDEY, Amit Kumar. QUADRUPLE FIXED POINT THEOREMS FOR (α,ψ) - CONTRACTIVE TYPE MAPPINGS IN PARTIALLY ORDERED METRIC SPACES. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 2, n. 6, p. 27–43, 2015. Disponível em: https://jgrma.com/index.php/jgrma/article/view/225. Acesso em: 29 apr. 2025.