@book { EindeutscherKriegsgefangenerinFrankreich,
    title = "Ein deutscher Kriegsgefangener in Frankreich",
    author = "Joachim {Sistig}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14138",
    url = "https://www.peterlang.com/document/1110543"
}