Discrete Mathematics
Discrete Mathematics > 2002 > 258 > 1-3 > 161-177
Discrete Mathematics > 2004 > 288 > 1-3 > 177-183
Discrete Mathematics > 2008 > 308 > 24 > 6132-6140
Discrete Mathematics > 2002 > 258 > 1-3 > 161-177
Discrete Mathematics > 2004 > 288 > 1-3 > 177-183
Discrete Mathematics > 2008 > 308 > 24 > 6132-6140