Discrete Applied Mathematics
Discrete Applied Mathematics > 2001 > 114 > 1-3 > 249-253
Discrete Applied Mathematics > 2001 > 115 > 1-3 > 73-76
Discrete Applied Mathematics > 2001 > 114 > 1-3 > 249-253
Discrete Applied Mathematics > 2001 > 115 > 1-3 > 73-76