Four-dimensional couplings among BF and massless Rarita-Schwinger   theories: a BRST cohomological approach
  The local and manifestly covariant Lagrangian interactions in four spacetime dimensions that can be added to a free model that describes a massless Rarita-Schwinger theory and an Abelian BF theory are constructed by means of deforming the solution to the master equation on behalf of specific cohomological techniques. 
C. Bizdadea, E. M. Cioroianu, S. O. Saliu, S. C. Sararu, M. Iordache