Path Integral Approach to 't Hooft's Derivation of Quantum from   Classical Physics
  We present a path-integral formulation of 't Hooft's derivation of quantum from classical physics. The crucial ingredient of this formulation is Gozzi et al.'s supersymmetric path integral of classical mechanics. We quantize explicitly two simple classical systems: the planar mathematical pendulum and the Roessler dynamical system. 
Massimo Blasone, Petr Jizba and Hagen Kleinert