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Miu, L., Aldica, G., Cruceanu, E. et al. Small-field behaviour of the critical current in Bi2.8Pb1.2Ca4Sr4Cu7.2O x ceramic samples above liquid-nitrogen temperature. J Mater Sci Lett 9, 532–534 (1990). https://doi.org/10.1007/BF00725868
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DOI: https://doi.org/10.1007/BF00725868