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Advances in Difference Equations > 2016 > 2016 > 1 > 1-10
Siberian Mathematical Journal > 2015 > 56 > 4 > 662-677
Journal of Applied and Industrial Mathematics > 2014 > 8 > 2 > 196-207
Boundary Value Problems > 2014 > 2014 > 1 > 1-12