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JOURNAL OF COMBINATORIAL THEORY SERIES A, vol. 98, no. 1, page. 60 - 73, 2002-04

JOURNAL OF COMBINATORIAL THEORY SERIES A, vol. 113, no. 8, page. 1805 - 1820, 2006-11

JOURNAL OF COMBINATORIAL THEORY SERIES A, vol. 118, no. 3, page. 842 - 852, 2011-04

JOURNAL OF COMBINATORIAL THEORY SERIES A, vol. 95, no. 2, page. 335 - 348, 2001-08

JOURNAL OF COMBINATORIAL THEORY SERIES A, vol. 119, no. 3, page. 546 - 555, 2012-04

JOURNAL OF COMBINATORIAL THEORY SERIES A, vol. 119, no. 4, page. 904 - 922, 2012-05

JOURNAL OF COMBINATORIAL THEORY SERIES A, vol. 102, no. 2, page. 255 - 271, 2003-05