TY - JOUR AU - S. Umbreit TI - Properties of Prealgebraic Lattices Investigated by Means of Formal Concept Analysis JO - Beiträge zur Algebra und Geometrie PY - 1992 SP - 139 EP - 152 VL - 33 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/BAG_1992__33_138512/ ID - BAG_1992__33_138512 ER -