Ivanov G.G. (1976) Non-proteolytic enzymes of human gastric and duodenal mucosa in peptic ulcer. Voprosy Meditsinskoi Khimii, 22(3), 339-342.
et al. Non-proteolytic enzymes of human gastric and duodenal mucosa in peptic ulcer // Voprosy Meditsinskoi Khimii. - 1976. - V. 22. -N 3. - P. 339-342.
et al., "Non-proteolytic enzymes of human gastric and duodenal mucosa in peptic ulcer." Voprosy Meditsinskoi Khimii 22.3 (1976): 339-342.
Ivanov, G. G. (1976). Non-proteolytic enzymes of human gastric and duodenal mucosa in peptic ulcer. Voprosy Meditsinskoi Khimii, 22(3), 339-342.