The electron capture in 163Ho experiment – ECHo L. Gastaldo, K. Blaum, K. Chrysalidis, T. Day Goodacre, A. Domula, M. Door, H. Dorrer, Ch.E. Düllmann, K. Eberhardt, S. Eliseev et al. (39 more) Eur. Phys. J. Special Topics, 226 8 (2017) 1623-1694 Published online: 20 June 2017 DOI: 10.1140/epjst/e2017-70071-y