Strichartz estimates for the Wave and Schrodinger Equations with   Potentials of Critical Decay
  We prove weighted L^2 (Morawetz) estimates for the solutions of linear Schrodinger and wave equation with potentials that decay like |x|^{-2} for large x, by deducing them from estimates on the resolvent of the associated elliptic operator. We then deduce Strichartz estimates for these equations. 
Nicolas Burq, Fabrice Planchon, John G. Stalker, A. Shadi   Tahvildar-Zadeh