1. J. P. Blaizot, Phys. Reports, submitted.
2. B. K. Jennings and A. D. Jackson, Phys. Reports, submitted.
3. Theory of finite Fermi systems and applications to atomic nuclei;Migdal,1967
4. Electron Scattering from a Quantized Liquid Drop
5. D. E. Bainum et al., preprint.