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Open Mathematics > 2012 > 10 > 1 > 159-172
Central European Journal of Mathematics > 2012 > 10 > 1 > 159-172
Mathematics and Computers in Simulation > 2005 > 68 > 4 > 355-373
Open Mathematics > 2012 > 10 > 1 > 159-172
Central European Journal of Mathematics > 2012 > 10 > 1 > 159-172
Mathematics and Computers in Simulation > 2005 > 68 > 4 > 355-373