@book { IndustrieversicherungsmaklerinDeutschland,
    title = "Industrieversicherungsmakler in Deutschland",
    author = "Philipp {Seul}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093868"
}