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2. Properties of solutions of loss sytem in the case of periodic intensities;Gnedenko;Diff. Equations,1971
3. On the conditions of an existence of final probabilities for a Markov process;Gnedenko;Math. Oper. Statist.,1973
4. On a generalization of Erlang formulae;Gnedenko;Zastos. Matem.,1971
5. Uniform coupling of nonhomogeneous Markov chains;Griffeath;J. Appl. Probab.,1975