@incollection{Brandmueller1990,
  author    = {Walter Brandm{\"u}ller},
  title     = {Konstanz, Konzil von (1414-1418)},
  booktitle = {Theologische Realenzyklop{\"a}die, Band 19: Kirchenrechtsquellen - Kreuz},
  editor    = {Gerhard M{\"u}ller},
  isbn      = {978-3-11-012355-5},
  year      = {1990},
}