%0 Journal Article %A E. L. Presman %T Time of stay of a system in a faulty state %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1964 %P 78-81 %V 71 %U http://geodesic.mathdoc.fr/item/TM_1964_71_a8/ %G ru %F TM_1964_71_a8