%0 Journal Article %A E. A. Begovatov %A N. P. Evlampiev %T Diffusion approximation in closed queueing systems %J Issledovaniya po Prikladnoi Matematike i Informatike %D 1981 %P 93-101 %V 9 %N 9 %U http://geodesic.mathdoc.fr/item/KUIPM_1981_9_9_a12/ %G ru %F KUIPM_1981_9_9_a12