Vu, Thi Thanh, and Thuy Duyen Dao. “A Study on Interaction Patterns in Language Learning Online Classes – Adaptation and Efficiency”. Proceedings of the AsiaCALL International Conference, vol. 533, no. 978-94-6239-343-1, Jan. 2021, pp. 54-63, doi:10.2991/assehr.k.210226.007.