@book { CompetitiveIntelligenceEinLeitfaden,
    title = "Competitive Intelligence. Ein Leitfaden",
    author = "Benjamin {Schorn}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638048033",
    url = "https://www.hausarbeiten.de/document/90574"
}