Open Mathematics
Open Mathematics > 2003 > 1 > 1 > 61-78
Open Mathematics > 2004 > 2 > 5 > 840-858
Open Mathematics > 2006 > 4 > 1 > 163-182
Open Mathematics > 2003 > 1 > 1 > 61-78
Open Mathematics > 2004 > 2 > 5 > 840-858
Open Mathematics > 2006 > 4 > 1 > 163-182