@book { EnergiewendeinDeutschland,
    title = "Energiewende in Deutschland",
    author = "Sarah {Hölting}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656487944",
    url = "https://www.hausarbeiten.de/document/232801"
}