1. Periodic motions of particle in the gravity field of a rotating triaxial ellipsoid;Batrakov;Biul. Inst. Teoret. Astron. Akad. Nauk SSSR,1957
2. Equilibrium longitudes of geostationary satellites;Blitzer;AIAA J.,1968
3. On libration points in the gravitational field of a rotating body;Aksenov;Soobshch. gos. Astron. Inst. im. P. K. Shternberg,1960
4. On steady-state motions in the gravitational field of a rotating body;Zhuravlev,1976
5. On stationary points in the attraction fields of the Earth;Zhuravlev;the Moon and Mars. Astron. Zh.,1977