Stability analysis of fractional differential systems with order lying in ( 1 , 2 ) . Zhang, Fengrong; Li, Changpin — 2011 Advances in Difference Equations [electronic only]
Common fixed points for compatible mappings of type (A). Liu, Zeqing; Zhang, Fengrong; Mao, Jianfeng — 1999 Bulletin of the Malaysian Mathematical Society. Second Series