TY - CONF TI - Extending standard cluster algorithms to allow for group constraints AF - Compstat 2006 - Proceedings in Computational Statistics PP - Heidelberg, Germany SN - 3-7908-1708-2 PB - Physica-Verlag SP - 885 EP - 892 PY - 2006-03-01 AU - Leisch, Friedrich AU - GrĂ¼n, Bettina ER -