Discrete Applied Mathematics
Discrete Applied Mathematics > 2001 > 109 > 3 > 223-235
Discrete Applied Mathematics > 2001 > 113 > 2-3 > 275-284
Discrete Applied Mathematics > 2001 > 109 > 3 > 223-235
Discrete Applied Mathematics > 2001 > 113 > 2-3 > 275-284