中国科学院数学与系统科学研究院期刊网
Nonlinear Discrete Inequality in Two Variables with Delay and Its Application
Hong WANG, Ke-long ZHENG, Chun-xiang GUO
Acta Mathematicae Applicatae Sinica(English Series) . 2014, (2): 389 -400 .  DOI: 10.1007/s10255-014-0287-x