Zlateva, R. “THE VISUAL LOAD DUE TO MAN-MACHINE WORK (COMPUTER, DIGITAL DEVICES)”. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, Vol. 8, no. 1, June 2024, pp. 1-11, doi:10.29114/ajtuv.vol8.iss1.292. Accessed 20 Aug. 2025.