K. Domagała, M. A. Ziółek, M. Maroszek, K. Szymczak, B. Janik, and A. Bakier, “PERIOPERATIVE RISK STRATIFICATION AND OPTIMIZATION IN ELDERLY SURGICAL PATIENTS: A REVIEW OF MODERN STRATEGIES AND BIOLOGICAL MARKERS IN THE ERA OF VALUE-BASED HEALTHCARE”, IJITSS, vol. 5, no. 1(49), Mar. 2026, doi: 10.31435/ijitss.1(49).2026.5189.