DISCRETE MATHEMATICS, vol. 270, no. 1-3, page. 43 - 60, 2003-08-28
DISCRETE APPLIED MATHEMATICS, vol. 130, no. 1, page. 1 - 1, 2003-08-08
IEEE TRANSACTIONS ON INFORMATION THEORY, vol. 49, no. 5, page. 1275 - 1282, 2003-05
RAMANUJAN JOURNAL, vol. 7, no. 1-3, page. 45 - 48, 2003-03
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, vol. 131, no. 11, page. 3309 - 3317, 2003-01
ABHANDLUNGEN AUS DEM MATHEMATISCHEN SEMINAR DER UNIVERSITAT HAMBURG, vol. 73, page. 289 - 295, 2003-01