The Poisson Bracket for Poisson Forms in Multisymplectic Field Theory
  We present a general definition of the Poisson bracket between differential forms on the extended multiphase space appearing in the geometric formulation of first order classical field theories and, more generally, on exact multisymplectic manifolds. It is well defined for a certain class of differential forms that we propose to call Poisson forms and turns the space of Poisson forms into a Lie superalgebra. 
Michael Forger, Cornelius Paufler, Hartmann Roemer