1. D. Boccaletti and G. Pucacco, Theory of Orbits. Perturbative and Geometrical Methods (Springer, Berlin, 1999).
2. C. Marchal, The Three-Body Problem (Elsevier, Amsterdam, 1990).
3. M. Valtonen and H. Karttunen, The Three-Body Problem (Cambridge Univ. Press, Cambridge, 2006).
4. A. I. Martynova, V. V. Orlov, A. V. Rubinov, L. L. Sokolov, and I. I. Nikiforov, Dynamics of Triple Systems (SPb. Gos. Univ., St.-Petersburg, 2010) [in Russian].
5. J. von Schubart, Astron. Nachr. 283, 17 (1956).