@book { AkzeptierendeDrogenarbeit,
    title = "Akzeptierende Drogenarbeit",
    author = "Marie-Luise {Hess}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656125853",
    url = "https://www.hausarbeiten.de/document/188850"
}