Magnetic Interactions In YbBaCuO (x = 7.0, 6.0) From Yb Mössbauer Measurements J.A. Hodges, P. Bonville, P. Imbert et A. Pinatel-PhillipotJ. Phys. I France, 5 4 (1995) 501-515DOI: https://doi.org/10.1051/jp1:1995143