Трајкова, Радмила, Силвана Кралева, and Емил Хавзиу. “Cognitive Deficits in Adult Patients After Anesthesia in Non-Cardiac Surgery”. Archives of Public Health, vol. 9, no. 1, Aug. 2017, pp. 35-40, https://id-press.eu/aph/article/view/1109.