@book { UnitedNationsConferenceonSustainableDevelopment,
    title = "United Nations Conference on Sustainable Development ",
    author = "Dominik {Naab}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656242406",
    url = "https://www.hausarbeiten.de/document/198060"
}