Submitted on: 18 June 2001.
Revised on: 09 August 2001.
Accepted on: 25 August 2001.
___________________BULLETIN OF MATHEMATICAL BIOLOGY
Submitted on: 13 September 2011.
Revised on: 05 October 2011.
Accepted on: 28 November 2011.
___________________BULLETIN OF MATHEMATICAL BIOLOGY
Submitted on: 03 August 2014.
Revised on: 26 November 2014.
Accepted on: 22 December 2014.
___________________BULLETIN OF MATHEMATICAL BIOLOGY
Submitted on: 26 January 2013.
Revised on: 25 April 2013.
Accepted on: 30 May 2013.
___________________BULLETIN OF MATHEMATICAL BIOLOGY
Submitted on: 04 February 2021.
Revised on: 17 May 2021.
Accepted on: 15 July 2021.
___________________BULLETIN OF MATHEMATICAL BIOLOGY
Submitted on: 01 February 2024.
Revised on: 06 May 2024.
Accepted on: 19 June 2024.
___________________BULLETIN OF MATHEMATICAL BIOLOGY