@book { ImplementierungvonFacilityManagementimUniversittsklinikumAachenUKA,
    title = "Implementierung von Facility Management im Universitätsklinikum Aachen (UKA)",
    author = "Thomas A. {Aichmayr}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842815292",
    url = "https://m.diplom.de/document/228525"
}