  A priori analysis for a generalized local projection stabilized finite
element approximations for the solution of an advection-reaction equation is
presented in this article. The stability and a priori error estimates are
established for both the conforming and the nonconforming (Crouzeix-Raviart)
approximations with respect to the local projection streamline derivative norm.
Finally, the validation of the proposed stabilization scheme and verification
of the the derived estimates are presented with appropriate numerical
experiments.
