
https://theconversation.com/cocoa-prices-are-surging-west-african-countries-should-seize-the-moment-to-negotiate-a-better-deal-for-farmers-214305

https://www.economiesuisse.ch/de/artikel/kluge-steuerpolitik-bringt-wohlstand

https://www.mckinsey.com/~/media/McKinsey/Business%20Functions/Strategy%20and%20Corporate%20Finance/Our%20Insights/The%20value%20of%20value%20creation/The-value-of-value-creation.pdf