OWAN RAPHAEL A., CHRIS-CHINEDU, JOY N., and ASU ISAAC A. “Application and Uses of Four-Parameter Estimates of Nonlinear Growth Analysis”. Journal of Discoveries in Applied and Natural Science, vol. 2, no. 5, May 2024, pp. 35-46, https://journals.proindex.uz/index.php/JDANS/article/view/1021.