Discrete Mathematics
Discrete Mathematics > 2009 > 309 > 4 > 867-877
Discrete Mathematics > 2009 > 309 > 8 > 2223-2232
Discrete Mathematics > 2009 > 309 > 12 > 3992-3997
Discrete Mathematics > 2009 > 309 > 14 > 4746-4749
Discrete Mathematics > 2009 > 309 > 4 > 867-877
Discrete Mathematics > 2009 > 309 > 8 > 2223-2232
Discrete Mathematics > 2009 > 309 > 12 > 3992-3997
Discrete Mathematics > 2009 > 309 > 14 > 4746-4749