@book { PsychischeStrungenbeikrperlichenErkrankungen,
    title = "Psychische Störungen bei körperlichen Erkrankungen",
    author = "Felicitas {Franziska} and Barbara {Gladziwa}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640063499",
    url = "https://www.hausarbeiten.de/document/108146"
}