@book { DieKatharerKetzerHexenundInquisitionimMittelalter,
    title = "Die Katharer. Ketzer, Hexen und Inquisition im Mittelalter",
    author = "Maximilian  {Stangier}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640829521",
    url = "https://www.hausarbeiten.de/document/166610"
}