GRAPHS AND COMBINATORICS, vol. 8, no. 3, page. 277 - 285, 1992-01
DISCRETE MATHEMATICS, vol. 135, no. 1-3, page. 129 - 151, 1994-12-25
JOURNAL OF ALGEBRA, vol. 321, no. 5, page. 1367 - 1382, 2009-03-01
DISCRETE MATHEMATICS, vol. 105, no. 1-3, page. 131 - 142, 1992-08-14
CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, vol. 42, no. 4, page. 747 - 761, 1990-08
JOURNAL OF GRAPH THEORY, vol. 17, no. 5, page. 621 - 627, 1993-11
JOURNAL OF PURE AND APPLIED ALGEBRA, vol. 50, no. 2, page. 155 - 169, 1988-02