@book { AFocusontwoPortraitsofAnthonyvanDyck,
    title = "A Focus on two Portraits of Anthony van Dyck",
    author = "Cristina {Flores}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/270529"
}