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GAIDUK, A. L.; GASAN, V. M.; DEMIRSKII, V. V.; ZHERLITSYN, S. V.; KOLOBOV, I. G.; TABACHNIKOVA, E. D.; D, F. V. The Role of the Oxygen Deficiency in the Change of Sound Velocity in YBa2Cu3O7-d below 20 K. Fiz. Nizk. Temp. 1990, 16, 606-606.