@book { IchbewusstseinGruppenbewusstsein,
    title = "Ichbewusstsein – Gruppenbewusstsein",
    author = "Sander {Wilkens}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15744",
    url = "https://www.peterlang.com/document/1110921"
}