Nuclear forward scattering by the 68.7 keV state of 73Ge in CaGeO3 and GeO2 R. E. Simon, I. Sergueev, J. Persson, C. A. McCammon, F. Hatert and R. P. Hermann EPL, 104 1 (2013) 17006 Published online: 15 November 2013 DOI: 10.1209/0295-5075/104/17006