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Physics Letters A > 2010 > 374 > 9 > 1197-1200
Journal of Theoretical Biology > 2007 > 248 > 2 > 317-321
Applied Mathematics Letters > 2006 > 19 > 12 > 1399-1405
Physics Letters A > 2010 > 374 > 9 > 1197-1200
Journal of Theoretical Biology > 2007 > 248 > 2 > 317-321
Applied Mathematics Letters > 2006 > 19 > 12 > 1399-1405