@Article{designFormation2012,
  author =       {Triwanto Simanjuntak and Masaki Nakamiya and Yasuhiro Kawakatsu},
  title =        {Design of Natural Loose Formation Flying around Halo Orbits},
  journal =      {Trans. Japan Soc. Aero. Space Sci.},
  year =         {2012},
  OPTkey =       {},
  volume =       {55},
  number =       {4},
  pages =        {254-262},
  OPTmonth =     {},
  OPTnote =      {},
  OPTannote =    {}
}