@unpublished{MeraTarkhanov2016,
  author  = {Azal Mera and Nikolai Nikolaevich Tarkhanov},
  title   = {The Neumann problem after Spencer},
  institution = {Institut f{\"u}r Mathematik},
  series    = {Preprints des Instituts f{\"u}r Mathematik der Universit{\"a}t Potsdam},
  number    = {5 (2016) 6},
  pages     = {21},
  year    = {2016},
}