@book { 30JahreSesamstrasseAnlasszurNostalgie,
    title = "30 Jahre Sesamstrasse - Anlass zur Nostalgie?",
    author = "Barbara {Lietz}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638232173",
    url = "https://www.hausarbeiten.de/document/18981"
}