B, D., B. R, D. C, F. P, F. P, G. -Pouny, N. P, and S. M-J. “French Pharmaceutical Industry and Biologically Active Natural Products from Pierre Fabre Laboratories”. Malaysian Journal of Science, vol. 19, no. 1, Apr. 2000, pp. 13-18, https://juku.um.edu.my/index.php/MJS/article/view/8892.