Stora's fine notion of divergent amplitudes
  Stora and coworkers refined the notion of divergent quantum amplitude, somewhat upsetting the standard power-counting recipe. This unexpectedly clears the way to new prototypes for free and interacting field theories of bosons of any mass and spin. 
Joseph C. V\'arilly and Jos\'e M. Gracia-Bond\'ia
math-ph hep-th math.FA math.MP