@unpublished{AntonioukKiselevStepanenkoetal.2012,
  author  = {Alexandra Viktorivna Antoniouk and Oleg Kiselev and Vitaly Stepanenko and Nikolai Nikolaevich Tarkhanov},
  title   = {Asymptotic solutions of the Dirichlet problem for the heat equation at a characteristic point},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprints des Instituts f{\"u}r Mathematik der Universit{\"a}t Potsdam},
  number    = {1(2012)25},
  year    = {2012},
}