@book { FugendichtstoffeundKitte,
    title = "Fugendichtstoffe und Kitte",
    author = "Tobias {Ritter}",
    year = "2001",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640007356",
    url = "https://www.hausarbeiten.de/document/102352"
}