@book { DersachlicheSchutzbereichdeseuropischenPatents,
    title = "Der sachliche Schutzbereich des europäischen Patents",
    author = "Domenico {Valle}",
    year = "1996",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1083709"
}