中国科学院数学与系统科学研究院期刊网
PERIODIC SOLUTION OF PREDATOR-PREY DIFFUSIVE SYSTEM OF TWO SPECIES WITH TIME DELAY AND RATIO-DEPENDENCE
Shi Jie DONG, Wei Gao GE
Acta Mathematicae Applicatae Sinica . 2004, (1): 132 -141 .  DOI: 10.12387/C2004015