Rimrott, F. P. J., and W. L. Cleghorn. “The Collinearity Principle and Minimum Energy Orbits”. Technische Mechanik - European Journal of Engineering Mechanics 20, no. 4 (October 10, 2019): 305–310. Accessed May 1, 2024. https://journals.ub.ovgu.de/index.php/techmech/article/view/1103.