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Elsevier Ltd. ISBN-13: 978-0080977478 - Danby, J. M. A. (1992). Fundamentals of Celestial Mechanics. 2nd ed.,
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Notes: of particular interest is Danby's fantastic chapter on universal variables (6.9) - Goodyear, W. H. (1965). Completely general closed-form solution for coordinates and partial derivative of the two-body problem.
The Astronomical Journal, 70, 189. https://doi.org/10.1086/109713 - Goodyear, W. H. (1965). Errata: Completely general closed-form solution for coordinates and partial derivative of the two-body problem.
The Astronomical Journal, 70, 446. https://doi.org/10.1086/109760 - Everhart, E., & Pitkin, E. T. (1983). Universal variables in the two‐body problem.
American Journal of Physics, 51(8), 712–717. https://doi.org/10.1119/1.13152 - Shepperd, S. W. (1985). Universal Keplerian state transition matrix.
Celestial Mechanics, 35(2), 129–144. https://doi.org/10.1007/BF01227666 - Urban, S. E; Seidelmann, P. K. (2013) Explanatory Supplement to the Astronomical Almanac. 3rd ed.,
University Science Books. ISBN-13: 978-1891389856 - Vallado, D. A. (2013). Fundamentals of Astrodynamics and Applications. 4th ed.,
Microcosm Press. ISBN-13: 978-1881883180