Vlasenko, K.V., Volkov, S.V., Lovianova, I.V., Sitak, I.V., Chumak, O.O. and Bohdanova, N.H., 2023. Exploring usability principles for educational online courses: a case study on an open platform for online education. Educational Technology Quarterly [Online], 2023(2), pp.173–187. Available from: https://doi.org/10.55056/etq.602 [Accessed 5 November 2025].