@book { PrincipalAgentBeziehungenundProblemeinderdeutschenAktiengesellschaft,
    title = "Principal-Agent-Beziehungen und -Probleme in der deutschen Aktiengesellschaft",
    author = "Andreas {Tietz}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832436858",
    url = "https://m.diplom.de/document/219372"
}