Voynova , N., and N. Valkanova. “MONITORING AND CONTROL OF NON-IONIZING RADIATION, AS A FACTOR OF THE LIVING ENVIRONMENT AND OF THE SITES, SOURCES OF NON-IONIZING RADIATION ON THE TERRITORY OF DOBRICH DISTRICT IN 2020. ”. EurasianUnionScientists, Aug. 2021, pp. 6-11, doi:10.31618/ESU.2413-9335.2021.1.88.1409.