Feizal Faturahman, Mulawan Umar, and Theodorus. “Serum Calcium As a Preoperative Surrogate of Tumour Burden in Stage III Breast Carcinoma: A Cross-Sectional Surgical-Oncology Study”. Sriwijaya Journal of Surgery, Vol. 9, no. 1, June 2026, pp. 156-67, doi:10.37275/sjs.v9i1.153.