中国科学院数学与系统科学研究院期刊网
STUDY ON AN SIS EPIDEMIC MODEL WITH TIME VARIANT DELAY
San Ling YUAN;Zhi En MA
STUDY ON AN SIS EPIDEMIC MODEL WITH TIME VARIANT DELAY
San Ling YUAN;Zhi En MA
Journal of Systems Science and Complexity . 2002, (3): 299 -306 .