Discrete Mathematics
Discrete Mathematics > 2005 > 293 > 1-3 > 177-184
Discrete Mathematics > 2005 > 299 > 1-3 > 162-171
Discrete Mathematics > 2005 > 301 > 1 > 124-136
Discrete Mathematics > 2005 > 293 > 1-3 > 177-184
Discrete Mathematics > 2005 > 299 > 1-3 > 162-171
Discrete Mathematics > 2005 > 301 > 1 > 124-136