  The Duru-Kleinert (DK) method of solving unknown path integrals of quantum
mechanical systems by relating them to known ones does not apply to Markov
processes since the DK-transform of a Fokker-Planck equation is in general not
a Fokker-Planck equation. In this note, we present a significant modification
of the method, based again on a combination of path-dependent time and
coordinate transformations, to obtain such relations after all. As an
application we express unknown Green functions for a one-parameter family of
Markov processes in terms of the known one for the Schenzle-Brandt process.
