Elemental Periodic orbits Associated with the libration Points in the Circular Restricted 3-Body Problem.
Eusebius J. DoedelVolodymyr A. RomanovRandy C. PaffenrothHerbert B. KellerD. J. DichmannJorge Galán-VioqueAndré VanderbauwhedePublished in: Int. J. Bifurc. Chaos (2007)