中国科学院数学与系统科学研究院期刊网
Persistence and Periodic Solution on a Nonautonomous SIS Model with Delays
San Ling YUAN, Zhi En MA, Jin ZHEN
Persistence and Periodic Solution on a Nonautonomous SIS Model with Delays
San Ling YUAN, Zhi En MA, Jin ZHEN
应用数学学报(英文版) . 2003, (1): 167 -176 .