@book { KooperationundEgoismus,
    title = "Kooperation und Egoismus",
    author = "Ingrid {Dobrovits}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832476854",
    url = "https://m.diplom.de/document/222952"
}