Hanif, Nauman, et al. “The Correlation Between Serum Calcium Levels and Angiographic Severity of Coronary Artery Disease in Patients With Acute Coronary Syndrome”. International Journal of Pathology, vol. 24, no. 3, Oct. 2026, pp. 360-6, https://doi.org/10.59736/IJP.24.03.1120.