On the solvability of degenerate stochastic partial differential   equations in Sobolev spaces
  Systems of parabolic, possibly degenerate parabolic SPDEs are considered. Existence and uniqueness are established in Sobolev spaces. Similar results are obtained for a class of equations generalizing the deterministic first order symmetric hyperbolic systems. 
M\'at\'e Gerencs\'er, Istv\'an Gy\"ongy, and Nicolai Krylov
math.AP