@book { PratiquejuridiquedelapaixettrvedeDieupartirduconciledeCharroux9891250,
    title = "Pratique juridique de la paix et trêve de Dieu à partir du concile de Charroux (989-1250)",
    author = "Thomas {Gergen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097630"
}