1. Chauhan, A.: Massive open online courses (MOOCs): Emerging trends in assessment and accreditation. Digital Educ. Rev. 25, 7–17 (2014)
2. Cho, S.: Factors influencing the acceptance of massive open online courses: an explanatory study based on technology acceptance model. Korean J. Learner-Centered Curriculum Instruction 15(9), 601–619 (2015)
3. Global digital education content market 2019–2023. Rising influence of data analytics in digital education to boost growth. Technavio. Bus. Wire NA (2019). Gale General OneFile. link.gale.com/apps/doc/A606821873/ITOF?u=ull_ttda&sid=summon&xid=672626b3
4. Lysova, E.: Digital modernization of the region's educational market and its influence on quality of education. Int. J. Qual. Res. (1800–6450), 14(1), 253 (2020)
5. Technavio adds report on the digital education content market. Entertainment close-up, p. NA (2020). Gale General OneFile. link.gale.com/apps/doc/A638040780/ITOF?u=ull_ttda&sid=summon&xid=117143d0