@book { LeonundderSchatzderRanenBand4,
    title = "Leon und der Schatz der Ranen - Band 4",
    author = "Eva {Maaser}",
    year = "2013",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955202170",
    url = "https://m.dotbooks.de/document/211199"
}