@book { ZumProblemPsychologieundhistorischerMaterialismus,
    title = "Zum Problem Psychologie und historischer Materialismus",
    author = "Erich {Fromm} and Rainer {Funk}",
    year = "2016",
    publisher = "Edition Erich Fromm",
    address = "München, Deutschland",
    url = "https://books.openpublishing.com/document/313969"
}