Photoproduction of positive pions from hydrogen at large angles in the energy range 0.3-2.0 GeV H.W. Dannhausen, E.J. Durwen, H.M. Fischer, M. Leneke, W. Niehaus and F. TakasakiEur. Phys. J. A, 11 4 (2001) 441-455DOI: https://doi.org/10.1007/s100500170056