1. Direct evidence for W exchange in charmed meson decay
2. CLEO Collab., P. Avery et al., submitted to 1985 Lepton photon Symp. (Kyoto, Japan)
3. J.L. Basdevant, I. Bediaga and E. Predazzi, to be published.
4. J.L. Basdevant, I. Bediaga, E. Predazzi and J. Tiomno, to be published.