1
by Vostokov, S.V., Ivanov, M.A.
published 2010
Volltext, Kostenfrei, Verlag
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4
6
8
9
by Ivanov, M.
Published in Sofija: Zemizdat (1975)
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13
by Ivanov, M.
Published in Me~dunarodnaja ~izn' (1959)
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14
17
18
by Ivanov, M., Volovich, I.
Published in Entropy (2001)
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19
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