@book { KonzeptionelleProblemeffentlicherPlanung,
    title = "Konzeptionelle Probleme öffentlicher Planung",
    author = "",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14086",
    url = "https://www.peterlang.com/document/1068612"
}