@book { KooperativeForschung,
    title = "Kooperative Forschung",
    author = "Andreas {Mladenov} and Karl Anton {Fröschl}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107926"
}