P. chandar reddy sangam, R. A. Raveesha A, V. CR, and M. . Gowda B G, “Correlation Of Serum Calcium Level with Gold Criteria in Chronic Obstructive Pulmonary Disease Patients in A Tertiary Care Centre Tamaka Kolar”, J Neonatal Surg, vol. 14, no. 14S, pp. 288–291, Apr. 2025.