فهرست مقالات Ratul Kar مقاله 1 - Common fixed point results for graph preserving mappings in parametric $N_b$-metric spaces 20.1001.1.22520201.2020.09.02.7.6 S. Kumar Mohanta R. Kar Journal of Linear and Topological Algebra , شماره 2 , سال 9 , بهار 2020
