@book { DieAusfhrungsvariantendesqigong,
    title = "Die Ausführungsvarianten des «qigong»",
    author = "Friederike {Baeumer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097686"
}