Левченко [Valeriy Levchenko] В. А., and Сарабай [Dana Sarabai] Д. В. “Method Objectification a Hyperventilating Syndrome at Neurocirculatory Dystonias at Girls”. Slobozhanskyi Herald of Science and Sport, no. 2(35), Apr. 2013, pp. 154-6, https://journals.uran.ua/index.php/1991-0177/article/view/18600.