@book { VierJahreungarischesGrundgesetz,
    title = "Vier Jahre ungarisches Grundgesetz",
    author = "Herbert {Küpper} and Zoltán {Csehi} and Csaba {Láng}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06541-1",
    url = "https://www.peterlang.com/document/1050078"
}