1. Altman, S. P.: 1972,Celes. Mech. 6, 425–446.
2. Breakwell, J. V.: 1973, Private communication with J. L. Junkins.
3. Byrd, P. F. and Friedman, M. D.: 1971,Handbook of Elliptic Integrals, 2nd ed., Springer-Verlag, pp. 227–229.
4. Erdélyi, A. et al.: 1953,Higher Transcendental Functions, McGraw-Hill, Vol. 2, p. 363.
5. Herrick, S.: 1965,Astron. J. 70, 309–315.