@book { WissensmanagementinKleinunternehmen,
    title = "Wissensmanagement in Kleinunternehmen",
    author = "Alfred {Schaider}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832444679",
    url = "https://m.diplom.de/document/220072"
}