@book { EndogeneRegionalentwicklunginNordrheinWestfalen,
    title = "Endogene Regionalentwicklung in Nordrhein-Westfalen",
    author = "Sylvia {Lorenz}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656194491",
    url = "https://www.hausarbeiten.de/document/194404"
}