中国科学院数学与系统科学研究院期刊网
THE WELL POSEDNESS OF THE TIME-DEPENDENT POPULATION DANAMICS SYSTEM AND THE OPTIMAL CONTROL ON THE FERTILITY RATE
Jian Zhong SHEN;Zong Ben XU
Journal of Systems Science and Mathematical Sciences . 2001, (3): 274 -282 .  DOI: 10.12341/jssms09734