@book { MobilittsanforderungenanIngenieure,
    title = "Mobilitätsanforderungen an Ingenieure",
    author = "Heiner {Schomburg}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832400477",
    url = "https://m.diplom.de/document/216005"
}