@book { AltrechtlichePersonenzusammenschlsse,
    title = "Altrechtliche Personenzusammenschlüsse",
    author = "Raik {Schneider}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095543"
}