Applied Mathematics Letters
Applied Mathematics Letters > 2012 > 25 > 10 > 1495-1499
Applied Mathematics Letters > 2012 > 25 > 12 > 2015-2017
Applied Mathematics Letters > 2012 > 25 > 10 > 1495-1499
Applied Mathematics Letters > 2012 > 25 > 12 > 2015-2017