1. Classifying relative equilibria. I;Palmore, Julian I.;Bull. Amer. Math. Soc.,1973
2. 2. J. I. Palmore, Relative equilibria of the n-body problem, Thesis, University of California, Berkeley, Calif., 1973.
3. 3. S. Smale, Problems in dynamical systems and celestial mechanics, (preprint). University of California, Berkeley, Calif., 1974.