Bernstein-Gel'fand-Gel'fand reciprocity and indecomposable projective   modules for classical algebraic supergroups
  We prove a BGG type reciprocity law for the category of finite dimensional modules over algebraic supergroups satisfying certain conditions. The equivalent of a standard module in this case is a virtual module called Euler characteristic due to its geometric interpretation. In the orthosymplectic case, we also describe indecomposable projective modules in terms of those Euler characteristics. 
Caroline Gruson and Vera Serganova
math.RT