Topological gauge fixing
  We implement the metric-independent Fock-Schwinger gauge in the abelian quantum Chern-Simons field theory defined in ${\mathbb R}^3$. The expressions of the various components of the propagator are determined. Although the gauge field propagator differs from the Gauss linking density, we prove that its integral along two oriented knots is equal to the linking number. 
Laurent Gallot, Enore Guadagnini, Eric Pilon and Frank Thuillier
hep-th math-ph math.MP