Vlasenko, K. V., Volkov, S. V., Lovianova, I. V., Sitak, I. V., Chumak, O. O., & Bohdanova, N. H. (2023). Exploring usability principles for educational online courses: a case study on an open platform for online education. Educational Technology Quarterly, 2023(2), 173-187. https://doi.org/10.55056/etq.602