@unpublished{MeleardRoelly2011,
  author  = {Sylvie M{\´e}l{\´e}ard and Sylvie Roelly},
  title   = {A host-parasite multilevel interacting process and continuous approximations},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Mathematische Statistik und Wahrscheinlichkeitstheorie : Preprint},
  number    = {2011, 01},
  year    = {2011},
}