K. Keulerz

Mixed valence on dilute Eu in YCu2Si2

D. Wohlleben, P. Weidner, H. Braun, 1985 .

Valence instability in magnetically ordered Eu(Pd1−xAux)2Si2

U. Köbler, W. Zinn, M. Abd-Elmeguid, 1985 .

The valence of cerium in CeCu2Si2 under high pressure

J. Röhler, K. Keulerz, J. Klug, 1988 .

Anomalies in the CuO structure of EuBa2Cu3O7−δ at 110 K and 250 K

J. Röhler, K. Keulerz, U. Murek, 1988 .

High temperature susceptibility, valence and volume anomaly of some Ce-compounds

D. Wohlleben, P. Weidner, B. Roden, 1985 .