@book { DasFlowErlebnisMihalyCsikszentmihaly1975,
    title = "Das Flow Erlebnis - Mihaly Csikszentmihaly (1975)",
    author = "Christian {Heiss}",
    year = "2001",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640029259",
    url = "https://www.hausarbeiten.de/document/104603"
}