1. Sakalosh, T.V. (2006). Development of information and communication technologies: innovations and crisis phenomena. Economic bulletin of NTUU "KPI", 3, 260–266.
2. ICT world market. https://www.tadviser.ru/index.php
3. Forrester Research. https://www.forrester.com/Home/0,3257,1,FF.htm
4. Tarasova, K.I. (2018). The market of information and communication technologies in the system of the national economy. Market infrastructure, 16, 46–51. http://www.market-infr.od.ua/journals/2018/16_2018_ukr/9.pdf
5. The Wall Street Journal, International Data Corp. (IDC).