@book {9783402198254, title = "Bernhard von Clairvaux", author = "Diers, Michaela", isbn = "9783402198254", url = "http://www.content-select.com/index.php?id=bib_view&ean=9783402198254", url = "https://content-select.com/de/portal/media/view/60421706-1cdc-4ad9-9849-5a28b0dd2d03", publisher = "Aschendorff Verlag", language = "ger", }