Discrete Mathematics
Discrete Mathematics > 2009 > 309 > 13 > 4235-4240
Discrete Mathematics > 2009 > 309 > 14 > 4793-4809
Discrete Mathematics > 2009 > 309 > 18 > 5781-5788
Discrete Mathematics > 2009 > 309 > 13 > 4235-4240
Discrete Mathematics > 2009 > 309 > 14 > 4793-4809
Discrete Mathematics > 2009 > 309 > 18 > 5781-5788