TY - JOUR T1 - JO - Journal of Algebraic Combinatorics UR - http://dx.doi.org/10.1023/a:1011264315849 PY - 2001/05/01 AU - Whitehouse S ED - DO - DOI: 10.1023/a:1011264315849 PB - Springer Science and Business Media LLC VL - 13 IS - 3 SP - 317 EP - 326 Y2 - 2024/12/21 ER -