Applied Mathematics and Computation
Applied Mathematics and Computation > 2006 > 173 > 2 > 977-984
Applied Mathematics and Computation > 2011 > 218 > 2 > 337-345
Applied Mathematics and Computation > 2006 > 173 > 2 > 977-984
Applied Mathematics and Computation > 2011 > 218 > 2 > 337-345