ELECTRONIC JOURNAL OF COMBINATORICS, vol. 17, no. 1, 2010-08-16
EUROPEAN JOURNAL OF COMBINATORICS, vol. 31, no. 6, page. 1560 - 1566, 2010-08
ELECTRONIC JOURNAL OF COMBINATORICS, vol. 17, no. 1, page. R78, 2010-05-25
GRAPHS AND COMBINATORICS, vol. 26, no. 2, page. 147 - 162, 2010-03
LINEAR ALGEBRA AND ITS APPLICATIONS, vol. 432, no. 2-3, page. 722 - 737, 2010-01-15