
https://wiiw.ac.at/trade-balances-and-international-competitiveness-in-cyber-physical-digital-task-intensive-ict-capital-intensive-and-traditional-industries-dlp-6561.pdf

http://www.europarl.europa.eu/RegData/etudes/IDAN/2017/599352/EPRS_IDA%282017%29599352_EN.pdf

https://committees.parliament.uk/publications/8781/documents/88926/default/