Discrete Mathematics
Discrete Mathematics > 2002 > 244 > 1-3 > 83-94
Discrete Mathematics > 2002 > 247 > 1-3 > 159-168
Discrete Mathematics > 2002 > 256 > 1-2 > 55-81
Discrete Mathematics > 2002 > 244 > 1-3 > 83-94
Discrete Mathematics > 2002 > 247 > 1-3 > 159-168
Discrete Mathematics > 2002 > 256 > 1-2 > 55-81