Submitted on: 15 December 2019.
Revised on: 30 January 2020.
Accepted on: 07 March 2020.
___________________Communications in Mathematical Biology and Neuroscience
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Submitted on: 07 August 2003.
Revised on: 25 October 2003.
Accepted on: 10 December 2003.
___________________Communications in Mathematical Biology and Neuroscience
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Submitted on: 27 August 2009.
Revised on: 26 October 2009.
Accepted on: 21 December 2009.
___________________Communications in Mathematical Biology and Neuroscience
Submitted on: 19 March 2012.
Revised on: 13 May 2012.
Accepted on: 05 June 2012.
___________________Communications in Mathematical Biology and Neuroscience
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