@book { WennEigenwerbungzumProgrammwird,
    title = "Wenn Eigenwerbung zum Programm wird",
    author = "Silvan {Lerch}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1102563"
}