@book { DieKonvergenzkriteriendesMaastrichtVertrages,
    title = "Die Konvergenzkriterien des Maastricht-Vertrages",
    author = "Lars {Bünning}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13674",
    url = "https://www.peterlang.com/document/1068266"
}