Discrete Applied Mathematics
Discrete Applied Mathematics > 2001 > 111 > 3 > 219-229
Discrete Applied Mathematics > 2001 > 114 > 1-3 > 23-28
Discrete Applied Mathematics > 2001 > 111 > 3 > 219-229
Discrete Applied Mathematics > 2001 > 114 > 1-3 > 23-28