1. AHERS 2021: Agency for Higher Education of Republic of Srpska (AHERS), Accreditation of Study Programs, (2021).;
2. Bugarski 1996: Ranko Bugarski. Uvod u opštu lingvistiku [Introduction in General Linguistics]. Beograd: BIGZ.;
3. Castro 2019: Robin Castro. Blended learning in higher education: Trends and capabilities. Education and Information Technologies, 24, 2523-2546;
4. Cerović-Mićić et al 2021: Tunde Koracs Cerović, Katarina Mićić & Selena Vračar. A leap to the digital era-what are lower and upper secondary school students' experiences of distance education during the COVID-19 pandemic in Serbia? Euoropean Journal of Psychology of Education. [July 12, 2021].;
5. Conrad 2002: Diana Conrad. Deep in the hearts of learners: Insights into the nature of online community. Journal of Distance Education, 17(1), 1-19.;