1. H. Kleinert,Phys. Lett. 71A, 66 (1979).
2. Y. R. Lin-Liu, K. Maki, and D. Vollhardt,J. Phys. Lett. (Paris)39, L-381 (1978);
3. Phys. Rev. B. 20, 59 (1979),J. Low Temp. Phys. 37, 627 (1979); see also W. M. Saslow and C. R. Hu,J. Phys. Lett. (Paris)39, L-379 (1978).
4. H. Kleinert, Collective Field Theory of Superfluid He3, extended Erice Lecture Notes (1978), Berlin preprint.
5. T. L. Ho, Ph.D. Thesis, Cornell University (1978) unpublished.