[1] Bundestag (2001) – Wissenschaftliche Dienste: mdpi.com/2076-3387/13/12/245#:~:text=The%20significance%20of%20entrepreneurial%20ecosystems,2017%3B%20Stam%20and%20Spigel%202016
[2] Gabler Wirtschaftslexikon (Günter Faltin, 2020): wirtschaftslexikon.gabler.de/definition/entrepreneurship-51931
[3] Walter Isaacson (2011) – Steve Jobs (Biografie, Simon & Schuster)
[4 ] Spiegel (2017) – Wiederverwendbare Rakete: spiegel.de/wissenschaft/weltall/space-rider-esa-setzt-auf-wiederverwendbares-raumfahrzeug-a-1181107.html
[5] Business Insider (2010) – Five Years Later: businessinsider.com/huffington-post-comes-of-age-2010-5
[6] Forbes (2021) – Blackstone Deal: forbes.com/sites/marisadellatto/2021/10/20/blackstone-buys-majority-stake-in-spanx-in-deal-valuing-shapewear-pioneer-at-12-billion/
[7] Harvard Business School (Farronato & Fradkin, 2018): library.hbs.edu/working-knowledge/the-airbnb-effect-cheaper-rooms-for-travelers-less-revenue-for-hotels
[8] The Guardian (2011) – Obituary Anita Roddick: theguardian.com/fashion/fashion-blog/2011/nov/21/brief-history-of-body-shop
[9] Britannica (2025) – Facebook Overview: britannica.com/money/Facebook
[10] Der Bundestag: bundestag.de/resource/blob/514970/c53e4a68b9f022a81ba4d06f086694fb/Entrepreneurship.pdf
[11] EY (2024) – Entrepreneurial Lessons: ey.com/en_ch/insights/private-business/amazing-entrepreneurship-lessons-and-key-takeaways
[12] Opportunitätsorientiertes Unternehmertum:sajesbm.co.za/index.php/sajesbm/article/view/858/1056#:~:text=between%20necessity,entrepreneurial%20success%2C%20this%20only%20applies
[13] Imitierendes Unternehmertum:emeritus.org/blog/entrepreneurship-types-of-entrepreneurs/#:~:text=Imitative%20entrepreneurship%20refers%20to%20the,risk%20being%20seen%20as%20copycats
[14] Notwendigkeitsgetriebenes Unternehmertum: sajesbm.co.za/index.php/sajesbm/article/view/858/1056#:~:text=Opportunity,2015%3A183
[15] Soziales Unternehmertum:socsc.ktu.lt/index.php/Social/article/view/9256/4444#:~:text=that%20they%20strive%20to%20work,it%20is%20necessary%20to%20emphasize
[16] Block, J. H., & Wagner, M. (2010). Necessity and Opportunity Entrepreneurs in Germany: Characteristics and Earnings Differentials. Schmalenbach Business Review, 62(2), 154–174
[17] Peredo, A. M., & McLean, M. (2006). Social Entrepreneurship: A Critical Review of the Concept. Journal of World Business, 41(1), 56–65. (Sozialunternehmertum zielt auf sozialen Wert)
Naldi, L., Nordqvist, M., Sjöberg, K., & Wiklund, J. (2007). Entrepreneurial Orientation, Risk Taking, and Performance in Family Firms. Family Business Review, 20(1), 33–47: sciencedirect.com/science/article/pii/S0148296324003485