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Hellman, E. S. (1993).
Comment on the isotope effect in superconducting Ba1 − xKxBiO3. Physica C: Superconductivity, 211(3-4), 486–487.
doi:10.1016/0921-4534(93)90155-j
10.1016/0921-4534(93)90155-j
