Lavrov, E., N. Barchenko, N. Pasko, and I. Borozenec. “Development of Models for the Formalized Description of Modular E-Learning Systems for the Problems on Providing Ergonomic Quality of Human-Computer Interaction”. Eastern-European Journal of Enterprise Technologies, vol. 2, no. 2 (86), Apr. 2017, pp. 4-13, doi:10.15587/1729-4061.2017.97718.