Superstrings on AdS_4 x CP^3 from Supergravity
  We derive from a general formulation of pure spinor string theory on type IIA backgrounds the specific form of the action for the AdS_4 x P^3 background. We provide a complete geometrical characterization of the structure of the superfields involved in the action. 
Riccardo D'Auria, Pietro Fre', Pietro Antonio Grassi, and Mario   Trigiante