ILRS: Pearlman, M.R., Degnan, J.J., and Bosworth, J.M., "The International Laser Ranging Service", Advances in Space Research, Vol. 30, No. 2, pp. 135-143, July 2002, DOI:10.1016/S0273-1177(02)00277-6.
LLR: J. Williams, J. Dickey, "Lunar Geophysics, Geodesy, and Dynamics", in Proceedings From the Science Session and Full Proceedings CD-ROM, edited by Ron Noomen, Steven Klosko, Carey Noll, and Michael Pearlman, NASA/CP-2003-212248, 2003.