Discrete Applied Mathematics
Discrete Applied Mathematics > 1997 > 74 > 3 > 295-299
Discrete Applied Mathematics > 1997 > 78 > 1-3 > 163-174
Discrete Applied Mathematics > 1997 > 74 > 3 > 295-299
Discrete Applied Mathematics > 1997 > 78 > 1-3 > 163-174