@book { AusSichtderMediation,
    title = "AusSicht der Mediation",
    author = "Heinz {Zwettler}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656330325",
    url = "https://www.hausarbeiten.de/document/205309"
}