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Computational Methods and Function Theory > 2018 > 18 > 4 > 723-750
Bulletin of the Iranian Mathematical Society > 2018 > 44 > 4 > 879-890
Iranian Journal of Science and Technology, Transactions A: Science > 2019 > 43 > 2 > 519-524
Mathematical and Computer Modelling > 2009 > 49 > 5-6 > 955-965
Applied Mathematics and Computation > 2008 > 204 > 2 > 862-871