1. Alliance for Affordable Internet. (2015): "Affordability report 2015-16". Available at https://a4ai.org/affordability-report/report/2015/ (24.08.2021.);
2. Alliance for Affordable Internet. (2019): "Affordability report 2019". Available at https://a4ai.org/affordability-report/ (24.08.2021.);
3. Beckett, Sarah. (2018): "what's the difference between skills and competencies?" Human resource Systems group. https://resources.hrsg.ca/blog/whats-the-difference-between-skills-and-competencies#skills (09.08.2021.);
4. Carretero Stephanie, Vuorikari Riina, Punie Yves. (2017): "The digital competence framework for citizens". Publications Office of the European Union. https://publications.jrc.ec.europa.eu/repository/handle/JRC106281 (10.08.2021.);
5. Cooper, Joel. (2006): "The digital divide: The special case of gender". Journal of Computer Assisted Learning, 22, 320-334;