Discrete Applied Mathematics
Discrete Applied Mathematics > 2000 > 102 > 1-2 > 133-139
Discrete Applied Mathematics > 2000 > 107 > 1-3 > 203-214
Discrete Applied Mathematics > 2000 > 102 > 1-2 > 133-139
Discrete Applied Mathematics > 2000 > 107 > 1-3 > 203-214