1. Photographische Untersuchungen des Librationspunktes L5 im System Erde-Mond;Kordylewski;Acta Astronom.,1961
2. Stability of the triangular Lagrangian solutions of the restricted three-body problem in the three-dimensional circular case;Markeev;Sov. Astronom.,1972
3. On the stability of the triangular libration points in the circular bounded three-body problem;Markeev;Appl. Math. Mech.,1969
4. On the stability of the Lagrange periodic solutions of the restricted problem of three bodies;Leontovich;Sov. Math. Dokl.,1962
5. Theory of Orbits;Szebehely,1967