DEMYTER, Inna, GUDZ, Dmytro and VOROTYNTSEV, Sergey. Incidence of postoperative delirium according to cognitive status, improved responsiveness and inflammatory response at elderly patients in urgent abdominal surgery. Journal of Education, Health and Sport. Online. 16 November 2019. Vol. 9, no. 11, pp. 163-174. [Accessed 21 December 2025]. DOI 10.12775/JEHS.2019.09.11.013.