Symmetry Properties of Anisotropic Superfluids
  A system of equations is developed for a fluid with non-abelian local gauge symmetry. Anisotropy is introduced by requiring that the symmetry breaking preserves a restricted local gauge symmetry about a given direction in the gauge parameter space. A set of equations is proposed for the 3He-A system. Topological quantization conditions are discussed. 
James V. Lindesay, Harry L. Morrison