%0 Journal Article %A Lánská, Věra %T Diffusion approximation for a controlled service system %J Kybernetika %D 1982 %P 259-268 %V 18 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1982__18_4_a1/ %G en %F KYB_1982__18_4_a1