Discrete Applied Mathematics
Discrete Applied Mathematics > 2008 > 156 > 2 > 218-229
Discrete Applied Mathematics > 2008 > 156 > 12 > 2270-2278
Discrete Applied Mathematics > 2008 > 156 > 2 > 218-229
Discrete Applied Mathematics > 2008 > 156 > 12 > 2270-2278