“The Existence of Solutions for Second-Order Differential Equations under Almost Fisher-Type Multivalued F-Contractions in Metric Spaces”.
European Journal of Pure and Applied Mathematics 18, no. 4 (November 5, 2025): 6441. Accessed December 5, 2025.
https://www.ejpam.com/index.php/ejpam/article/view/6441.