On the Lagrange Stability of Motion and final Evolutions in the   Three-Body Problem
  For the three-body problem, we consider the Lagrange stability. To analyze the stability, along with integrals of energy and angular momentum, we use relations by the author from Sosnitskii (2005), which band together separately squared mutual distances between bodies (mass points) and squared mutual distances from bodies to the barycenter of the system. In this case, we prove the Lagrange stability theorem, which allows us to define more exactly the character of hyperbolic-elliptic and parabolic-elliptic final evolutions 
Stepan Sosnitskii
astro-ph.EP