1. 1. J. C. Anjos, and G. Gladding, 1987 . Contribution to the International Symposium on Lepton and Photon Interactions at High Energy, Hamburg; also see: 1988. These proceedings.
2. 2. J. Adler, 1987 . SLAC-PUB-4343.
3. 3. I. I. Bigi, 1987 . SLAC-PUB-4455; 1988. These proceedings.
4. 4. I. I. Bigi, 1987 . Proceedings of the Charm Physics Symposium, Beijing. SLAC-PUB-4349.
5. Direct evidence for W exchange in charmed meson decay