@book { EntkoppelteGesellschaftOstdeutschlandseit198990,
    title = "Entkoppelte Gesellschaft – Ostdeutschland seit 1989/90",
    author = "Yana {Milev} and Franz {Schultheis}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15529",
    url = "https://www.peterlang.com/document/1110907"
}