Yahaya, M., S. L. Lim, A. I. Ibrahim, W. C. Yeong, and M. B. C. Khoo. “A VARIABLE SAMPLE SIZE SYNTHETIC CHART FOR THE COEFFICIENT OF VARIATION”. 2022. The South African Journal of Industrial Engineering, vol. 33, no. 1, Mar. 2023, pp. 1-15, doi:10.7166/33-1-2545.