中国科学院数学与系统科学研究院期刊网
Positive Solutions of Non-Positone Nonlinear Operator Equations and Its Applications
Jing Xian SUN, Xi An XU
Acta Mathematica Sinica, Chinese Series . 2012, (1): 55 -64 .  DOI: 10.12386/A2012sxxb0005