A New Nonperturbative Approach to QCD by BF Theory
  Yang-Mills theory in the first order formalism appears as the deformation of a topological field theory, the pure BF theory. In this approach new non local observables are inherited from the topological theory and the operators entering the t'Hooft algebra find an explicit realization. A calculation of the {\it vev}'s of these operators is performed in the Abelian Projection gauge. 
Maurizio Martellini, Mauro Zeni, Francesco Fucito