@incollection{Breuer2013,
  author    = {Thomas Breuer},
  title     = {A G{\"o}del-Turing perspective on quantum states indistinguishable from inside},
  series = {A computable universe. Understanding and exploring nature as computation},
  editor    = {Hector Zenil},
  publisher = {World Scientific Publ.},
  address   = {New Jersey u.a.},
  pages     = {605 -- 616},
  year      = {2013},
  language  = {en}
}