Discrete Mathematics
Discrete Mathematics > 2004 > 277 > 1-3 > 15-28
Discrete Mathematics > 2004 > 278 > 1-3 > 109-125
Discrete Mathematics > 2004 > 285 > 1-3 > 7-15
Discrete Mathematics > 2004 > 286 > 3 > 255-261
Discrete Mathematics > 2004 > 289 > 1-3 > 25-44