@book { DerMassenmenschzuBeginndes20Jahrhunderts,
    title = "Der Massenmensch zu Beginn des 20. Jahrhunderts",
    author = "Charlotte {Jestaedt}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16027",
    url = "https://www.peterlang.com/document/1110868"
}