Zhuravlev, A. S., and M. I. Yaschenko. ‚ÄúPossibilities of Cold Therapy in Chronic Sinusitis‚ÄĚ. Problems of Cryobiology and Cryomedicine, vol. 15, no. 3, Sept. 2005, pp. 476-8, https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1166.