by Koren'Kov D. A.
by Barav A. I.
by Khvostova V. V.
by Sokolenko E. A.
by Krall E. L.
by Petrov D.F.
by Kardashevski S. V.
by All Union Conference.
by S. R. Nerpin.
by Bacharov, A. P.
by Mardzhanisvili, M. A.
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