00675naa#a2200205#i#450# EN\\bibl\8367 20260406082232.1 2308-8877 20151210b2015####ek#y0engy0150####ca RUS RU The use of led lamps to reduce the ripple factor of illumination Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 4 с. Journal article local Kanagina Yuliya Ivanova Anastasiya Kindeev Evgeniy Fokina Anna anni.editorum.ru