@book { Innovationswettbewerb,
    title = "Innovationswettbewerb",
    subtitle = "Determinanten und Unternehmensverhalten",
    author = "Stefan {Elsser}",
    year = "1993",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13985",
    url = "https://www.peterlang.com/document/1068523"
}