@book { RegionalentwicklungdurchdasKleingewerbe,
    title = "Regionalentwicklung durch das Kleingewerbe",
    author = "Abdoulaye {Aboubakar}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093245"
}