Quellenangaben:
[1] gdp per captiva ppp zu 2020 Ukraine:
https://tradingeconomics.com/ukraine/gdp-per-capita-ppp
[2] gdp per captiva ppp zu 2020 Russland:
https://tradingeconomics.com/russia/gdp-per-capita-ppp
[3] gdp per captiva ppp zu 2020 Deutschland:
https://tradingeconomics.com/germany/gdp-per-capita-ppp
[4] Wikipedia GDP PPP per captiva
https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)_per_capita
[5] Wikipedia GDP PPP
https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)
[6] Morgentau Plan
https://de.wikipedia.org/wiki/Morgenthau-Plan