%0 Journal Article %T On possible external nature of circahoralian periods spectra %A Panchelyuga, V.A. %A Panchelyuga, M.S. %K circahoralian periods, universal spectrum of periods, fluctuations, synchronization %J Russian Journal of Biological Physics and Chemisrty %D 2021 %N 6 %P 6 %I Federal State Educational Institution of Higher Education Sevastopol State University