TY - JOUR AU - Lánská, Věra TI - Diffusion approximation for a controlled service system JO - Kybernetika PY - 1982 SP - 259 EP - 268 VL - 18 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_1982__18_4_a1/ LA - en ID - KYB_1982__18_4_a1 ER -