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Open Mathematics > 2014 > 12 > 1 > 167-174
Open Mathematics > 2013 > 11 > 2 > 283-295
Open Mathematics > 2012 > 10 > 2 > 797-806
Open Mathematics > 2009 > 7 > 4 > 650-659
Open Mathematics > 2003 > 1 > 2 > 169-183
Open Mathematics > 2014 > 12 > 1 > 167-174
Open Mathematics > 2013 > 11 > 2 > 283-295
Open Mathematics > 2012 > 10 > 2 > 797-806
Open Mathematics > 2009 > 7 > 4 > 650-659
Open Mathematics > 2003 > 1 > 2 > 169-183