Pomeron factorisation and the reaction [gamma]N → [phi]N Dass, G. V. Fraas, H. 1974 - DESY EPflicht - frei zugänglich
Time-reversal-invariance-like relations for spin-effects in elastic and inelastic reactions; vector-meson photoproduction versus compton scattering from nucleons Dass, G. V. Fraas, H. 1974 - DESY EPflicht - frei zugänglich