Discrete Mathematics
Discrete Mathematics > 2009 > 309 > 4 > 647-654
Discrete Mathematics > 2009 > 309 > 6 > 1584-1592
Discrete Mathematics > 2009 > 309 > 10 > 3385-3392
Discrete Mathematics > 2009 > 309 > 12 > 3811-3820
Discrete Mathematics > 2009 > 309 > 13 > 4266-4269
Discrete Mathematics > 2009 > 309 > 20 > 6146-6148
Discrete Mathematics > 2009 > 309 > 23-24 > 6503-6507