@book { TrajectoryWorkModellCorbinundStrauss,
    title = "Trajectory Work Modell- Corbin und Strauss",
    author = "Alexander {Loos}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638627498",
    url = "https://www.hausarbeiten.de/document/71701"
}