Discrete Mathematics
Discrete Mathematics > 2005 > 290 > 1 > 99-103
Discrete Mathematics > 2005 > 296 > 2-3 > 225-234
Discrete Mathematics > 2005 > 304 > 1-3 > 51-61
Discrete Mathematics > 2005 > 290 > 1 > 99-103
Discrete Mathematics > 2005 > 296 > 2-3 > 225-234
Discrete Mathematics > 2005 > 304 > 1-3 > 51-61