Discrete Applied Mathematics
Discrete Applied Mathematics > 2008 > 156 > 7 > 986-997
Discrete Applied Mathematics > 2008 > 156 > 10 > 1670-1682
Discrete Applied Mathematics > 2008 > 156 > 15 > 2827-2834
Discrete Applied Mathematics > 2008 > 156 > 17 > 3194-3202