http://reply.papertrans.cn/3/295/29404/29404-31.png
http://reply.papertrans.cn/3/295/29404/29404-32.png
Submitted on: 01 May 2008.
Revised on: 11 June 2008.
Accepted on: 08 July 2008.
THEORETICAL POPULATION BIOLOGY
http://reply.papertrans.cn/3/295/29404/29404-34.png
http://reply.papertrans.cn/3/295/29404/29404-35.png
Submitted on: 09 December 2000.
Revised on: 20 December 2000.
Accepted on: 05 January 2001.
THEORETICAL POPULATION BIOLOGY