@book { ExhibitionUntersuchungdesSelbst,
    title = "Exhibition - Untersuchung des Selbst",
    author = "Marcus {Pfab}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836607018",
    url = "https://m.diplom.de/document/229049"
}