Observation of the pseudogap in the heavily overdoped high-temperature superconductor P. S. Häfliger, A. Podlesnyak, K. Conder, E. Pomjakushina and A. FurrerEurophys. Lett., 67 6 (2004) 1018-1023DOI: https://doi.org/10.1209/epl/i2004-10199-0
