中国科学院数学与系统科学研究院期刊网
AMS
Some Fixed Point Theorems for Expansion onto Mappings on Cone Metric Spaces
Chintaman T. AAGE, Jagannath N. SALUNKE
Acta Mathematica Sinica . 2011, (6): 1101 -1106 .  DOI: 10.1007/s10114-011-9606-9