@inproceedings{CoHiVi2007,
Author = {Andrew Colombi and Anil N. Hirani and Benjamin F. Villac},
Booktitle = {17th {AAS/AIAA} {S}pace {F}light {M}echanics {M}eeting, {S}edona, {A}rizona},
Month = {January 28 -- February 1},
Organization = {{A}merican {A}stronautical {S}ociety and {A}merican {I}nstitute of {A}eronautics and {A}stronautics},
Title = {Efficient Gravity Field Computation for Trajectory Propagation Near Small Bodies, {P}aper {AAS} 07-223},
Url = {http://www.cs.illinois.edu/hirani/papers/CoHiVi2007_SFM.pdf},
Year = {2007}}