Nasadyuk, Christina, et al. “The Role of Cyclooxygenase Isoforms in the Mechanisms of Cytoprotection of Gastric Mucosa under the Influence of Hexapeptide Arg-a-Asp-Lys-Val-Tyr-Arg”. Current Issues in Pharmacy and Medical Sciences, vol. 25, no. 4, Dec. 2012, pp. 446-8, https://doi.org/10.12923/j.2084-980X/25.4/a.23.