@book { DerWucher291Abs1Satz1StGB,
    title = "Der Wucher (§ 291 Abs. 1 Satz 1 StGB)",
    author = "Martin {Laufen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097776"
}