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Optical and Quantum Electronics > 2014 > 46 > 9 > 1117-1126
Applied Mathematics and Computation > 2011 > 217 > 9 > 4369-4376
Optical and Quantum Electronics > 2014 > 46 > 9 > 1117-1126
Applied Mathematics and Computation > 2011 > 217 > 9 > 4369-4376