@book { MeisterEckhartundKarlMarxDierealeUtopiederOrientierungamSein,
    title = "Meister Eckhart und Karl Marx: Die reale Utopie der Orientierung am Sein",
    subtitle = "Meister Eckhart and Karl Marx on Having and Being",
    author = "Erich {Fromm} and Rainer {Funk}",
    year = "2015",
    publisher = "Edition Erich Fromm",
    address = "München, Deutschland",
    url = "https://books.openpublishing.com/document/307258"
}