Some results on fixed point theorems for multivalued mappings in complete metric spaces. Ume, Jeong Sheok; Lee, Byung Soo; Cho, Sung Jin — 2002 International Journal of Mathematics and Mathematical Sciences
Common fixed points for nonexpansive and nonexpansive type fuzzy mappings. Lee, Byung Soo; Kim, Do Sang; Lee, Gue Myung; Cho, Sung Jin — 1995 International Journal of Mathematics and Mathematical Sciences