GEORGIEVA, TSVETELINA, TZVETELIN GUEORGUIEV, SEHER KADIROVA, BORIS EVSTATIEV, and NIKOLAY MIHAILOV. 2018. “ANALYSIS OF USING DIGITAL LEARNING MATERIALS IN ENGINEERING LABORATORY COURSES”. Journal of Engineering Studies and Research 24 (1):24-29. https://doi.org/10.29081/jesr.v24i1.64.