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International Journal of Applied Mathematics and Computer Science > 2015 > 25 > 4 > 833-847
International Journal of Applied Mathematics and Computer Science > 2009 > 19 > 2 > 233-246
International Journal of Applied Mathematics and Computer Science > 2015 > 25 > 4 > 833-847
International Journal of Applied Mathematics and Computer Science > 2009 > 19 > 2 > 233-246