Бондаренко, Л. А., Н. Н. Сотник, and В. А. Козак. “Whether It Is Possible to Consider Light in a Night-Time As a Stress Factor?”. Photobiology and Photomedicine, Vol. 12, no. 3, 4, Dec. 2015, pp. 60-63, https://periodicals.karazin.ua/photomedicine/article/view/4614.