@ARTICLE{Hau77,
  author = {Hauck, J\"urgen},
  title = {Zum {Z}wischenwertsatz in der konstruktiven {A}nalysis},
  journal = {Wissenschaftliche Zeitschrift der Humboldt-Universit\"at zu Berlin
	Math.-Nat. R.},
  year = {1977},
  volume = {26},
  pages = {623--627},
  number = {5},
  keywords = {bib,cca}
}