@book { DasDritteinKunstundTherapie,
    title = "Das Dritte in Kunst und Therapie",
    author = "Peter {Sinapius} and Annika {Niemann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108041"
}