Covariant Impulse Approximation for the study of the internal structure   of composite particles
  We present a brief review on the Impulse Approximation method to study processes of scattering off composite particles. We first construct the model in a non-relativistic fashion that enables us to extend the model to a covariant Impulse Approximation, which is needed for the study of high momentum transfer processes. 
Maurizio De Sanctis, Mario A. Acero, Diego A. Milanes, Carlos E.   Sandoval