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