Discrete Applied Mathematics
Discrete Applied Mathematics > 2007 > 155 > 10 > 1336-1343
Discrete Applied Mathematics > 2007 > 155 > 18 > 2487-2495
Discrete Applied Mathematics > 2007 > 155 > 10 > 1336-1343
Discrete Applied Mathematics > 2007 > 155 > 18 > 2487-2495