Common fixed point theorems in 2 non-Archimedean Menger P M -space. Chugh, Renu; Sumitra — 2001 International Journal of Mathematics and Mathematical Sciences
A common fixed-point theorem in 2 non-Archimedean Menger PM-space for R-weakly commuting maps of type (P). Alamgir Khan, M.; Sumitra — 2008 Novi Sad Journal of Mathematics
Common fixed point theorem for non-self mappings satisfying generalized Ćirić type contraction condition in cone metric space. Sumitra, R.; Uthariaraj, V.Rhymend; Hemavathy, R.; Vijayaraju, P. — 2010 Fixed Point Theory and Applications [electronic only]