@unpublished{FedchenkoTarkhanov2017,
  author  = {Dmitry Fedchenko and Nikolai Nikolaevich Tarkhanov},
  title   = {A Rad{\´o} Theorem for the Porous Medium Equation},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprints des Instituts f{\"u}r Mathematik der Universit{\"a}t Potsdam},
  number    = {6 (2017) 1},
  pages     = {12},
  year    = {2017},
}