@book { DasErneuerbareEnergienGesetz2009EEG2009,
    title = "Das Erneuerbare Energien Gesetz 2009 (EEG 2009)",
    author = "Stefan {Hermanns}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640243495",
    url = "https://www.hausarbeiten.de/document/120832"
}