Discrete Applied Mathematics
Discrete Applied Mathematics > 2010 > 158 > 3 > 180-188
Discrete Applied Mathematics > 2011 > 159 > 16 > 1736-1750
Discrete Applied Mathematics > 2010 > 158 > 3 > 180-188
Discrete Applied Mathematics > 2011 > 159 > 16 > 1736-1750