@unpublished{DyachenkoTarkhanov2012,
  author  = {Evgueniya Dyachenko and Nikolai Nikolaevich Tarkhanov},
  title   = {Degeneration of boundary layer at singular points},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprints des Instituts f{\"u}r Mathematik der Universit{\"a}t Potsdam},
  number    = {1(2012)23},
  year    = {2012},
}