1. Adam, D., & Johannwille, U. (1998). Komplexitätsfalle. In D. Adam (Ed.), Komplexitätsmanagement (pp. 5–28).
2. Albach, H. (1992). Strategische Allianzen, strategische Gruppen und strategische Familien. Zeitschrift für Betriebswirtschaft (ZfB), 62(6), 663–670.
3. Alphabet. (2017). Annual Report 2016. Available online at https://abc.xyz/investor/pdf/2016_google_annual_report.pdf, checked on 5/29/2017.
4. Amazon. (2023). Who we are. Available online at https://www.aboutamazon.com/about-us, checked on 9/14/2023.
5. Andrews, K. (2003). The concept of corporate strategy. In H. Mintzberg, J. Lampel, J. B. Quinn, & S. Ghoshal (Eds.), The strategy process (Vol. 4, pp. 72–79).