1. GOLDSTEIN, H. Classical Mechanics, Addison-Wesley Publishing, Reading, Massachusetts, 1980, Chapter 2, Section 3.
2. WEISSTEIN, E. W. Encyclopedia of Mathematics, Chapman and Hall/CRC, New York, New York, 1999, pp. 107.
3. BATTIN, R. H. An Introduction to the Mathematics and Methods of Astrodynamics, AIAA Education Series, American Institute of Aeronautics and Astronautics, Inc., New York, New York, 1987, Chapter 3, Section 3, Equation (3.17).
4. BYRD, P. F. and FRIEDMAN, M. D. Handbook of Elliptic Integrals for Engineers and Scientists, Second Edition, Revised, Springer-Verlag Publishing, Berlin, Germany, 1971, Section 230.
5. BRYSON, A. E. and HO, Y.-C. Applied Optimal Control, Revised Printing, Taylor & Francis, Pennsylvania, 1975, Chapter 2, Section 7, Problem 6.