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Iranian Journal of Science and Technology, Transactions A: Science > 2018 > 42 > 4 > 2207-2215
Journal of Mathematical Analysis and Applications > 2014 > 410 > 1 > 55-69
Journal of Mathematical Analysis and Applications > 2012 > 394 > 1 > 1-12
Journal of Systems Science and Complexity > 2006 > 19 > 4 > 527-537