Мусабаева, Г. ., А. Акылбеков, and К. Мусабаев. “On the Origin of Spontaneous Emission of Atoms”. BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY. PHYSICS. ASTRONOMY SERIES, vol. 122, no. 1, July 2022, pp. 64-67, doi:10.32523/2616-6836-2018-122-1-64-67.