@book { InternetCommunitiesimMusikinstrumentenfachhandel,
    title = "Internet Communities im Musikinstrumentenfachhandel",
    author = "Bernhard {Krabina}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832428341",
    url = "https://m.diplom.de/document/218562"
}