@unpublished{LeonardRoellyZambrini2013,
  author  = {Christian L{\´e}onard and Sylvie Roelly and Jean-Claude Zambrini},
  title   = {Temporal symmetry of some classes of stochastic processes},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprints des Instituts f{\"u}r Mathematik der Universit{\"a}t Potsdam},
  number    = {2 (2013) 7},
  year    = {2013},
}