Applied Mathematics Letters
Applied Mathematics Letters > 2010 > 23 > 1 > 22-25
Applied Mathematics Letters > 2010 > 23 > 4 > 390-394
Applied Mathematics Letters > 2010 > 23 > 5 > 581-584
Applied Mathematics Letters > 2010 > 23 > 1 > 22-25
Applied Mathematics Letters > 2010 > 23 > 4 > 390-394
Applied Mathematics Letters > 2010 > 23 > 5 > 581-584