H. J. Natalia, O. M. Natalia, R. S. M. Fernanda, C. R. Marianela, V. Z. Rolando, and M. R. German Leonardo, “Analysis and Characterization of Quality Systems in the Natural Medicinal Products Industry in Costa Rica and the World”, Int J Drug Reg Affairs, vol. 9, no. 4, pp. 6-19, Dec. 2021.