Magnetic structures and crystal field in the heavy electron materials YbAgGe and YbPtIn P. Bonville, M. Rams, K. Królas, J.-P. Sanchez, P. C. Canfield, O. Trovarelli and C. Geibel Eur. Phys. J. B, 55 1 (2007) 77-84 Published online: 09 February 2007 DOI: 10.1140/epjb/e2007-00042-6