@book { MechanischeSchwingungen,
    title = "Mechanische Schwingungen",
    author = "Markus {Edelmann} and Frank {Reinhardt}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832420925",
    url = "https://m.diplom.de/document/217927"
}