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    Automated Spacecraft Conjunction Assessment at Mars and the Moon - A Five Year Update

    Berry, David / Tarzi, Zahi / Roncoli, Ralph B. et al. | AIAA | 2018

    Automated spacecraft conjunction assessment at Mars and the moon - a five year update

    Wilson, Roby S. / Roncoli, Ralph B. / Tarzi, Zahi B. et al. | NTRS | 2018

    Design of an Extended Mission for GRAIL

    Sweetser, Theodore H. / Wallace, Mark S. / Hatch, Sara J. et al. | NTRS | 2012

    Trajectory Design of the Lunar Impactor Mission Concept

    Chung, Min-Kun J. / McElrath, Timothy P. / Roncoli, Ralph B. | NTRS | 2006

    Mars Orbit Rendezvous Strategy for the Mars 2003/2005 Sample Return Mission

    DAmario, Louis A. / Bollman, Willard E. / Lee, Wayne J. et al. | NTRS | 1999

    Mars Observer mission design

    Beerer, Joseph G. / Horvat, Glen M. / Roncoli, Ralph B. | NTRS | 1989