@book { Digitalcontrolmethodsforalinefollowingrobot,
    title = "Digital control methods for a line following robot",
    author = "Steffen {Block}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832475123",
    url = "https://m.diplom.de/document/222793"
}