Dielectric signature of charge order in lanthanum nickelatesP. Sippel, S. Krohns, E. Thoms, E. Ruff, S. Riegg, H. Kirchhain, F. Schrettle, A. Reller, P. Lunkenheimer and A. LoidlEur. Phys. J. B, 85 7 (2012) 235DOI: https://doi.org/10.1140/epjb/e2012-30183-2