Hamiltonian path integral quantization in polar coordinates
  Using a scheme proposed earlier we set up Hamiltonian path integral quantization for a particle in two dimensions in plane polar coordinates.This scheme uses the classical Hamiltonian, without any $O(\hbar^2)$ terms, in the polar varivables. We show that the propagator satisfies the correct Schr\"{o}dinger equation. 
A.K.Kapoor and Pankaj Sharan