Open Mathematics
Open Mathematics > 2004 > 2 > 3 > 339-361
Open Mathematics > 2005 > 3 > 4 > 580-590
Open Mathematics > 2010 > 8 > 4 > 786-794
Open Mathematics > 2012 > 10 > 6 > 2283-2295
Open Mathematics > 2004 > 2 > 3 > 339-361
Open Mathematics > 2005 > 3 > 4 > 580-590
Open Mathematics > 2010 > 8 > 4 > 786-794
Open Mathematics > 2012 > 10 > 6 > 2283-2295