@book { DieflexiblenMechanismendesKyotoProtokolls,
    title = "Die flexiblen Mechanismen des Kyoto-Protokolls",
    author = "Stefan {Pierkes}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638784016",
    url = "https://www.hausarbeiten.de/document/75763"
}