Hussein, S., M. I. E. Halmi, and A. P. K. Ling. “The Modified Gompertz Model Demonstrates a Variable Growth Rate Between Two Centella Asiatica Phenotypes”. Journal of Biochemistry, Microbiology and Biotechnology, vol. 5, no. 1, July 2017, pp. 18-20, doi:10.54987/jobimb.v5i1.335.