JOURNAL OF ALGEBRAIC COMBINATORICS, vol. 20, no. 2, page. 213 - 218, 2004-09
GRAPHS AND COMBINATORICS, vol. 20, no. 4, page. 485 - 497, 2004-11
EUROPEAN JOURNAL OF COMBINATORICS, vol. 28, no. 2, page. 501 - 516, 2007-02
GRAPHS AND COMBINATORICS, vol. 26, no. 2, page. 147 - 162, 2010-03
EUROPEAN JOURNAL OF COMBINATORICS, vol. 27, no. 1, page. 79 - 89, 2006-01
JOURNAL OF ALGEBRAIC COMBINATORICS, vol. 20, no. 2, page. 219 - 235, 2004-09