@techreport{GeubSocolescu2017,
  author    = {Werner Geub and Dan Socolescu},
  title     = {The local isometric imbedding in \(\mathbb{R}^3\) of two-dimensional Riemannian manifolds with Gaussian curvature changing sign arbitrarily},
  institution = {Fachbereich Mathematik},
  series    = {Preprints (rote Reihe) des Fachbereich Mathematik},
  number    = {256},
  pages     = {13},
  year      = {2017},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-50327},
}