Ahmad, W. M. A. W., R. A. A. Rohim, Y. Norhayati, N. A. Aleng, and Z. Ali. “Developing A New Dimension of an Applied Exponential Model: Application in Biological Sciences”. Engineering, Technology & Applied Science Research, vol. 8, no. 4, Aug. 2018, pp. 3130-4, doi:10.48084/etasr.2124.