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Mathematical Methods in the Applied Sciences > 47 > 4 > 1781 - 1793
Advances in Difference Equations > 2017 > 2017 > 1 > 1-13
Applied Mathematical Modelling > 2013 > 37 > 20-21 > 8903-8911
Mathematical Methods in the Applied Sciences > 47 > 4 > 1781 - 1793
Advances in Difference Equations > 2017 > 2017 > 1 > 1-13
Applied Mathematical Modelling > 2013 > 37 > 20-21 > 8903-8911