@book { MittelstandsfrderungundBeschftigung,
    title = "Mittelstandsförderung und Beschäftigung",
    author = "Heiko {Sanders}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095091"
}