Dr. Judith A. Hudetz. “Is There a Relationship Between Intraoperative Bispectral Index and Cognitive Impairment After Coronary Artery Surgery?”. Global Journal of Medical Research, vol. 11, no. 4, July 2011, pp. 11-17, https://medicalresearchjournal.org/index.php/GJMR/article/view/100023.