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Keller, H.-J. and Pümpin, B. and Kündig, W. and Odermatt, W. and Patterson, B. D. and Schneider, Johannes W. and Simmler, H. and Connell, S. and Müller, K. A. and Bednorz, J. G. and Blazey, K. W. and Morgenstern, Ingo and Rossel, C. and Savic, I. M. (1988) Internal magnetic fields in YBa2Cu3O7−δ from Muon spin rotation experiments: Discussion in terms of a glasslike superconducting state. Physica C Superconductivity and its Applications 153-15 (1), pp. 71-74.
Schneider, Johannes W. and Baumeler, H. and Keller, H. and Odermatt, W. and Patterson, B. D. and Müller, K. and Bednorz, J. G. and Blazey, K. W. and Morgenstern, Ingo (1987) Internal magnetic fields in the high-Tc superconductors La1.8Sr0.2CuO4 and YBa2Cu3O7−δ from muon spin rotation experiments. Physics Letters A 124 (1-2), pp. 107-111.