@book{Schuermann1983,
  author    = {Sch{\"u}rmann, Wilhelm},
  title     = {Song of joy : Kippenberger, Sch{\"u}rmann [Martin Kippenberger - gemalte Bilder ; Wilhelm Sch{\"u}rmann - fotografierte Bilder]},
  publisher = {Neue Galerie},
  address   = {Aachen},
  pages     = {20 S. : {\"u}berw. Ill.},
  year      = {1983},
  language  = {en}
}
@book{SchuermannMueller1994,
  author    = {Sch{\"u}rmann, Wilhelm and M{\"u}ller, Christian Philipp},
  title     = {Temporary translation(s) - Sammlung Sch{\"u}rmann. Kunst der Gegenwart und Fotografie / Gestaltung der Seiten ...: Christian Philipp M{\"u}ller...},
  publisher = {Ars Nicolai},
  address   = {Berlin},
  isbn      = {3-89479-067-9},
  pages     = {165 S. : {\"u}berw. Ill, graph. Darst.},
  year      = {1994},
  language  = {en}
}