- Bate, R. R; Mueller, D. D; White, J. E. (1971). Fundamentals of Astrodynamics. 1st ed.,
Dover Publications, Inc. ISBN-13: 978-0486600611 - Carpino, M. et al. (2003). Error statistics of asteroid optical astrometric observations.
Icarus, 166, 248–270. https://doi.org/10.1016/S0019-1035(03)00051-4 - Curtis, H. D. (2014). Orbital Mechanics for Engineering Students. 3rd ed.,
Elsevier Ltd. ISBN-13: 978-0080977478 - Danby, J. M. A. (1992). Fundamentals of Celestial Mechanics. 2nd ed.,
William-Bell, Inc. ISBN-13: 978-0943396200 Notes: of particular interest is Danby's fantastic chapter on universal variables (6.9) - Hedo, J. M. et al. (2019). Minimum orbital intersection distance: an asymptotic approach.
Astronomy & Astrophysics, 633, A22. https://doi.org/10.1051/0004-6361/201936502 - Urban, S. E; Seidelmann, P. K. (2013) Explanatory Supplement to the Astronomical Almanac. 3rd ed.,
University Science Books. ISBN-13: 978-1891389856 - Wan, E. A; Van Der Merwe, R. (2000). The unscented Kalman filter for nonlinear estimation.
Proceedings of the IEEE 2000 Adaptive Systems for Signal Processing, Communications, and Control Symposium, 153-158. https://doi.org/10.1109/ASSPCC.2000.882463