Discrete Mathematics
Discrete Mathematics > 2009 > 309 > 8 > 2217-2222
Discrete Mathematics > 2009 > 309 > 13 > 4299-4305
Discrete Mathematics > 2009 > 309 > 16 > 5147-5157
Discrete Mathematics > 2009 > 309 > 8 > 2217-2222
Discrete Mathematics > 2009 > 309 > 13 > 4299-4305
Discrete Mathematics > 2009 > 309 > 16 > 5147-5157