Stability problems for stochastic models : proceedings of the 9th international seminar held in Varna, Bulgaria, May 13-19, 1985 / ed. by V.V. Kalashnikov, B. Penkov and V.M. Zolotarev. - Berlin, 1987. Przedm.: (The 9th International Seminar on Stability Problems for Stochastic Models)

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