TY - JOUR AU - Kramosil, Ivan TI - A selection-based formal description of an environment JO - Kybernetika PY - 1976 SP - EP - 150 VL - 12 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_1976__12_3_a1/ LA - en ID - KYB_1976__12_3_a1 ER -