Discrete Mathematics
Discrete Mathematics > 2011 > 311 > 6 > 478-492
Discrete Mathematics > 2011 > 311 > 16 > 1693-1698
Discrete Mathematics > 2011 > 311 > 21 > 2346-2358
Discrete Mathematics > 2011 > 311 > 6 > 478-492
Discrete Mathematics > 2011 > 311 > 16 > 1693-1698
Discrete Mathematics > 2011 > 311 > 21 > 2346-2358