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Bulletin of the Iranian Mathematical Society > 2018 > 44 > 4 > 879-890
Mathematical and Computer Modelling > 2009 > 49 > 5-6 > 955-965
Applied Mathematics and Computation > 2008 > 204 > 2 > 862-871
Bulletin of the Iranian Mathematical Society > 2018 > 44 > 4 > 879-890
Mathematical and Computer Modelling > 2009 > 49 > 5-6 > 955-965
Applied Mathematics and Computation > 2008 > 204 > 2 > 862-871