Universal Maslov class of Bohr - Sommerfeld lagrangian embedding to   pseudo - Einstein manifold
  In this paper we define the universal Maslov class of a Bohr - Sommerfeld lagrangian embedding to a simply connected pseudo - Einstein symplectic manifold. This class is an invariant of hamiltonian (isodrastic) deformations of a given Bohr - Sommerfeld lagrangian submanifold. 
N.A. Tyurin