A new view of valence instabilities in europium compounds: van Hove singularity in EuPdPC. Felser, S. Cramm, D. Johrendt, A. Mewis, O. Jepsen, G. Hohlneicher, W. Eberhardt and O. K. AndersenEurophys. Lett., 40 1 (1997) 85-92DOI: https://doi.org/10.1209/epl/i1997-00428-0