Discrete Applied Mathematics
Discrete Applied Mathematics > 2007 > 155 > 4 > 506-514
Discrete Applied Mathematics > 2007 > 155 > 10 > 1188-1199
Discrete Applied Mathematics > 2007 > 155 > 4 > 506-514
Discrete Applied Mathematics > 2007 > 155 > 10 > 1188-1199