Fixed point theorems for the class Q ( X , Y ) . Chen, Chi-Ming; Yen, Chi-Lin — 2005 International Journal of Mathematics and Mathematical Sciences
Fixed point theorems for nonexpansive mappings on nonconvex sets in UCED Banach spaces. Du, Wei-Shih; Huang, Young-Ye; Yen, Chi-Lin — 2002 International Journal of Mathematics and Mathematical Sciences