Discrete Mathematics
Discrete Mathematics > 2006 > 306 > 3 > 359-365
Discrete Mathematics > 2006 > 306 > 7 > 699-704
Discrete Mathematics > 2006 > 306 > 13 > 1327-1341
Discrete Mathematics > 2006 > 306 > 18 > 2270-2274
Discrete Mathematics > 2006 > 306 > 18 > 2212-2218