The Exact Solutions of Some Multidimensional Generalizations of the   Fokker-Planck Equation used by R. Friedrich and J. Peinke for the Description   of a Turbulent Cascade
  Some multidimensional generalizations of the Fokker-Planck equation used by R. Friedrich and J. Peinke for the description of a turbulent cascade as a stochastic process of Markovian type, are considered. The exact solutions of the Cauchy problems for these equations are found with the operator methods. 
A. A. Donkov, A. D. Donkov, E. I. Grancharova