@book { BusinessAnalysisProjectSolarIndustry,
    title = "Business Analysis Project Solar Industry ",
    author = "Tobias {Bandt}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640836345",
    url = "https://www.hausarbeiten.de/document/167218"
}