Hong, T. S., P. P. Shang, M. Arumugam, and R. Mohd Yusuff. “Use of Simulation to Solve Outpatient Clinic Problems: A Review of the Literature”. The South African Journal of Industrial Engineering, vol. 24, no. 3, Nov. 2013, pp. 27-42, doi:10.7166/24-3-551.