@book { RelevanceofBuyingCenterAnalysisinIndustrialMarkets,
    title = "Relevance of Buying Center Analysis in Industrial Markets",
    author = "Markus {Gaggl}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/270609"
}