Mössbauer emission measurements on highly dilute 57Fe impurities in the high superconductors La2 -xSrxCuO4 C. Garcin, P. Imbert, P. Bonville and J.A. Hodges J. Phys. I France, 4 12 (1994) 1829-1842 DOI: 10.1051/jp1:1994224