Hadronic shift in pionic hydrogen M. Hennebach, D. F. Anagnostopoulos, A. Dax, H. Fuhrmann, D. Gotta, A. Gruber, A. Hirtl, P. Indelicato, Y. -W. Liu, B. Manil et al. (5 more) Eur. Phys. J. A, 50 12 (2014) 190 Published online: 29 December 2014 DOI: 10.1140/epja/i2014-14190-x