Wisittipanich, W., C. Boonmee, K. Khwanngern, and W. Chattinnawat. “The Multi-Period Surgical Scheduling With Capacity Constraint: A Mathematical Modelling Approach”. International Journal of Global Optimization and Its Application, vol. 1, no. 2, June 2022, pp. 120-5, doi:10.56225/ijgoia.v1i2.21.