@book { Analysisofthedivergencebetweentheoryandpractice,
    title = "Analysis of the divergence between theory and practice",
    author = "Oliver {Schlösser}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832479282",
    url = "https://m.diplom.de/document/223173"
}