JOURNAL OF GRAPH THEORY, vol. 45, no. 2, page. 101 - 112, 2004-02
CHINESE ANNALS OF MATHEMATICS SERIES B, vol. 25, no. 1, page. 57 - 64, 2004-01
JOURNAL OF ALGEBRAIC COMBINATORICS, vol. 33, no. 4, page. 543 - 553, 2011-06
EUROPEAN JOURNAL OF COMBINATORICS, vol. 29, no. 3, page. 555 - 567, 2008-04