1. Pion production with polarized photons and test of vector dominance model
2. and private communications from Professor W. Jentschke and Drs. M. Kramer and D. Schildknecht.
3. M. Kramer and D. Schildknecht, Vector dominance model and π± production by unpolarized and linearly polarized photons, DESY 68/33.
4. Proc. Standford Conference;Ting,1967
5. Vector meson dominance and polarization