@book { HauptmannundFhrungimSchweizerkriegdesMittelalters,
    title = "Hauptmann und Führung im Schweizerkrieg des Mittelalters",
    author = "Albert {Sennhauser}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069269"
}