@book { SummertimeBluesEditionSingleShorty,
    title = "Summertime Blues: Edition Single Shorty",
    author = "Rudy {Namtel}",
    year = "2015",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1032654"
}