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M. Mumtaz and Nawazish A. Khan, Homogeneous distribution of carriers in the conducting planes by Zn substitution at Cu sites in Cu0.5Tl0.5Ba2Ca3Cu4O12-d superconductors, Low Temp. Phys. 36, (2009) [Fiz. Nizk. Temp. 36, 196-201, (2009)] DOI: https://doi.org/10.1063/1.3319351.