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Liang, J.K., Che, G.C., Chen, W. et al. Effect of heat-treatment process on superconductivity and crystal structure of compound Ba2YCu3O9−y . J Mater Sci Lett 6, 1321–1322 (1987). https://doi.org/10.1007/BF01794604
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DOI: https://doi.org/10.1007/BF01794604