@book { HeiligerKampfoderLandesverteidigung,
    title = "Heiliger Kampf oder Landesverteidigung?",
    author = "Tobias {Heinzelmann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097862"
}