@book { ErnstBarlach18701938,
    title = "Ernst Barlach (1870-1938)",
    author = "Heidi {Beutin} and Wolfgang {Beutin} and Heinrich {Bleicher-Nagelsmann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106894"
}