Journal of Northeastern University(Natural Science)
Fixed Point Theorems of Cone Expansion and Compression of Concave Functional Type in Product Space
ZHANG Guo-wei， ZHANG Xiu-ping
Journal of Northeastern University Natural Science . 2015, (2): 301 -304 .  DOI: 10.12068/j.issn.1005-3026.2015.02.032