Gayatri, A., N. Nafrialdi, R. D. Setiabudy, R. R. Tjandrawinata, A. Rachman, and M. Louisa. “A Clinical Trial on Biological Half Life of Bioactive Protein from Lumbricus Rubellus, DLBS1033 in Healthy Volunteers”. Acta Medica Indonesiana, vol. 50, no. 3, Oct. 2018, p. 208, https://actamedindones.org/index.php/ijim/article/view/600.