Discrete Applied Mathematics
Discrete Applied Mathematics > 2011 > 159 > 11 > 1131-1147
Discrete Applied Mathematics > 2011 > 159 > 12 > 1293-1301
Discrete Applied Mathematics > 2011 > 159 > 11 > 1131-1147
Discrete Applied Mathematics > 2011 > 159 > 12 > 1293-1301