@book { PaulScheerbartBriefwechselmitMaxBruns18891903undandereDokumente,
    title = "Paul Scheerbart: Briefwechsel mit Max Bruns 1889-1903 und andere Dokumente",
    author = "Leo D. {Ikelaar}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1077103"
}