Elimination of Rotational Degrees of Freedom in Expansion Methods for   Three Nucleons
  Euler angles determining rotations of a system as a whole are conveniently separated in three-particle basis functions. Analytic integration of matrix elements over Euler angles is done in a general form. Results for the Euler angle integrated matrix elements of a realistic NN interaction are listed. The partial wave decomposition of correlated three-body states is considered. 
V.D. Efros