@book { ElectoralreforminGermanyandCanada,
    title = "Electoral reform in Germany and Canada",
    author = "Sebastian {Grasser}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638823395",
    url = "https://www.hausarbeiten.de/document/76784"
}