Unique Deformation of Local Quantum Field Theory Resulting in   Divergence-free Amplitudes
  An essentially unique deformation of the product of quantum fields at the same spacetime point is obtained. It is proposed to replace local quantum field theory with another structure which uses a *-product. The resulting theory contains a fundamental length and is free from divergences. This provides the third deformation suggested by Faddeev. 
G.H. Gadiyar