TY - RPRT TI - A Time-Regularized, Multiple Gravity-Assist Low-Thrust, Bounded-Impulse Model for Trajectory Optimization AU - Ellison, Donald H. AU - Englander, Jacob A. AU - Conway, Bruce A. PY - 2017 UR - https://ntrs.nasa.gov/citations/20170001427 ID - 20170001427 ER -