The pion-nucleon scattering lengths from pionic hydrogen and deuterium H.-Ch. Schröder, A. Badertscher, P.F.A. Goudsmit, M. Janousch, H.J. Leisi, E. Matsinos, D. Sigg, Z.G. Zhao, D. Chatellard, J.-P. Egger et al. (4 more) Eur. Phys. J. C, 21 3 (2001) 473-488 Published online: 24 August 2001 DOI: 10.1007/s100520100754