Hamiltonization of theories with degenerate coordinates
  We consider a class of Lagrangian theories where part of the coordinates does not have any time derivatives in the Lagrange function (we call such coordinates degenerate). We advocate that it is reasonable to reconsider the conventional definition of singularity based on the usual Hessian and, moreover, to simplify the conventional Hamiltonization procedure. In particular, in such a procedure, it is not necessary to complete the degenerate coordinates with the corresponding conjugate momenta. 
D.M. Gitman (U. of Sao Paulo), I.V. Tyutin (Lebedev Phys. Inst.)