@book { GrundfragendesPatentrechtsbeiHermannIsay18731938,
    title = "Grundfragen des Patentrechts bei Hermann Isay (1873-1938)",
    author = "Stefanie {Steinmetz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18372",
    url = "https://www.peterlang.com/document/1063416"
}