@book { EvaluationstrategischerInstrumentezurGeschftsmodellanalyse,
    title = "Evaluation strategischer Instrumente zur Geschäftsmodellanalyse",
    author = "Matthias {Phul}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656159117",
    url = "https://www.hausarbeiten.de/document/184645"
}