中国科学院数学与系统科学研究院期刊网
A FIXED POINT THEOREM FOR DISCONTINUOUS INCREASING OPERATORS AND ITS APPLICATION
Jin Qing ZHANG, Jing Xan SUN
Acta Mathematicae Applicatae Sinica . 2001, (1): 34 -043 .  DOI: 10.12387/C2001022