1. 1Hyde, C. T., Foggat, C. E., and Weber, B. D. "Apollo Experience Report - Abort Planning," Tech. Rep. NASA-TN-D6847, National Aeronautics and Space Administration, Houston, TX, June 1972.
2. Improved Corrections Process for Constrained Trajectory Design in the n-Body Problem
3. 5Jezewski, D. J. "Primer Vector Theory and Applications," NASA Technical Report R-454, NASA Johnson Spaceflight Center, 1975.