@article{DachwaldOhndorfWie2008,
  author    = {Bernd Dachwald and A. Ohndorf and Bong Wie},
  title     = {Solar Sail Trajectory Optimization for the Solar Polar Imager (SPI) Mission},
  journal   = {AIAA Guidance, Navigation, and Control Conference \& Exhibit - AIAA Atmospheric Flight Mechanics Conference \& Exhibit - AIAA Modeling and Simulation Technologies Conference \& Exhibit - AIAA/AAS Astrodynamics Specialist Conference \& Exhibit : [21 - 24 August 2006, Keystone, Colorado ; papers]. - (AIAA meeting papers on disc ; [11.]2006,19-20 )},
  year      = {2008},
}