@book { AnArtistasSoldier,
    title = "An Artist as Soldier",
    author = "Barbara Schmitter {Heisler}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-1907-1",
    url = "https://www.peterlang.com/document/1051855"
}