Ermakova, N. Y., N. G. Kadnikova, A. D. Roshal, O. P. Synchykova, A. V. Shinder, and B. P. Sandomirsky. “Biological Activity of Apian Extracts Depending on the Way of Obtaining”. Problems of Cryobiology and Cryomedicine, vol. 16, no. 2, June 2006, pp. 192-00, https://journal.cryo.org.ua/index.php/probl-cryobiol-cryomed/article/view/600.