@book { AdministrativeRegelungenundUnternehmensgrndungen,
    title = "Administrative Regelungen und Unternehmensgründungen",
    author = "Gregor {Brüggelambert} and Barbara {Jennes}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1096122"
}