PATHAK, H. K., CHO, Y. J., CHANG, S. S. ., & KANG, S. M. (1995). COINCIDENCE POINT THEOREMS FOR MULTI-VALUED AND SINGLE-VALUED MAPPINGS IN MENGER PM-SPACES. Tamkang Journal of Mathematics, 26(4), 313–319. https://doi.org/10.5556/j.tkjm.26.1995.4410