1. Abhyankar RM (2019) The medium is a misnomer: the missing discussion in online discussion forums. (Master’s thesis). https://repository.library.georgetown.edu/bitstream/handle/10822/1054908/Abhyankar_georgetown_0076M_14301.pdf?sequence=1&isAllowed=y
2. Allen IE, Seaman J (2011) Going the distance: Online education in the United States, 2011. http://www.onlinelearningsurvey.com/reports/goingthedistance.pdf
3. Armstrong K, Manson M (2010) What is lost and what remains: An exploration of the pedagogical challenges of online discussions in two online teacher education learning communities. Language & Literacy 12(2):18–29
4. Beatty BJ (2006) Designing the HyFlex world - hybrid, flexible classes for all students. In: Paper presented at the Association for Educational Communication and Technology International Conference, Dallas, TX
5. Beatty BJ (ed) (2019) Hybrid-flexible course design: Implementing student-directed hybrid classes. https://edtechbooks.org/hyflex