https://wiiw.ac.at/digital-tasks-and-ict-capital-methodologies-and-data-dlp-6429.pdf
https://ecipe.org/blog/second-hamiltonian-moment/?mc_cid=cdc41ebfc8&mc_eid=286ad5ef5f
https://www.bain.com/globalassets/about/2023-global-pe-report—roadshow-deck.pdf
https://www.osw.waw.pl/sites/default/files/OSW-Report_The-middle-corridor_net.pdf