@book { GreenpoweralreadyoutofbreathWhydoGermanconsumersnotswitchtogreenelectricity,
    title = "Green power already out of breath? Why do German consumers not switch to green electricity?",
    author = "Sarah {Herz}",
    year = "2014",
    publisher = "Anchor Academic Publishing",
    address = "Hamburg, Germany",
    url = "https://m.anchor-publishing.com/document/287397"
}