Firsova, Liudmila Alekseevna, et al. “CATHELICIDINS, DEFENSINS AND PRO-INFLAMMATORY CYTOKINES OF ORAL FLUID IN CHILDREN WITH CHRONIC GASTRODUODENITIS”. Университетский терапевтический вестник, vol. 4, Nov. 2022, p. 136, https://utjournal.ru/article/view/4801.