@book { GrenzberschreitendeSpenden,
    title = "Grenzüberschreitende Spenden",
    author = "Raika {Voldrich}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14575",
    url = "https://www.peterlang.com/document/1057237"
}