1. J. Charles, A. Le Yaouanc, L. Oliver, O. Pène, J.-C. Raynal, LPTHE-Orsay 98-77, hep-ph/9812358, to appear in Phys. Rev. D.
2. See Ref. [1] and references therein.
3. Asymptotic behaviour of exclusive processes in QCD
4. For an extensive bibliography on quark models for form factors see The BaBar Physics Book, Appendix B (p. 981), P.F. Harrison, H.R. Quinn (Eds.), SLAC-R-504 (1998).
5. Relativistic Particle Dynamics. II