Electronic Journal of Combinatorics, vol. 16, no. 1, 2009-11-07
JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK, vol. 635, page. 213 - 235, 2009-10
APPLIED MATHEMATICS LETTERS, vol. 22, no. 10, page. 1604 - 1608, 2009-10
EUROPEAN JOURNAL OF COMBINATORICS, vol. 30, no. 5, page. 1164 - 1171, 2009-07
EUROPEAN JOURNAL OF COMBINATORICS, vol. 30, no. 3, page. 668 - 673, 2009-04
EUROPEAN JOURNAL OF COMBINATORICS, vol. 30, no. 3, page. 638 - 654, 2009-04
APPLIED MATHEMATICS LETTERS, vol. 22, no. 2, page. 159 - 162, 2009-02