Percolation limited magnetic order in Eu1-xCaxB6 G. A. Wigger, E. Felder, M. Weller, S. Streule, H. R. Ott, A. D. Bianchi and Z. Fisk Eur. Phys. J. B, 46 2 (2005) 231-235 Published online: 11 August 2005 DOI: 10.1140/epjb/e2005-00251-y