Discrete Applied Mathematics
Discrete Applied Mathematics > 1999 > 95 > 1-3 > 223-239
Discrete Applied Mathematics > 2010 > 158 > 15 > 1714-1717
Discrete Applied Mathematics > 2012 > 160 > 3 > 248-258
Discrete Applied Mathematics > 2013 > 161 > 16-17 > 2480-2491