Colak, Y. Z., Ozgul, U., Aslan, D. D., Cumurcu, H. B., Colak, C. and Durmus, M. (2021) “The effects of sedation with propofol and propofol- ketamin combination on postoperative cognitive function in elderly patients undergoing spinal anesthesia”, Annals of Medical Research, 28(6), pp. 1201–1205. Available at: http://www.annalsmedres.org/index.php/aomr/article/view/3819 (Accessed: 5 March 2024).