General form of deformation of Poisson superbracket
  Continuous formal deformations of the Poisson superbracket defined on compactly supported smooth functions on R^n taking values in a Grassmann algebra are described up to an equivalence transformation. It is shown that there are additional deformations which are different from the standard Moyal bracket. 
S.E.Konstein, A.G.Smirnov and I.V.Tyutin