- https://docs.bvsalud.org/biblioref/homeoindex/2017/hom-11840/hom-11840-152.pdf
- https://docs.bvsalud.org/biblioref/homeoindex/2017/hom-11840/hom-11840-154.pdf
- https://docs.bvsalud.org/biblioref/homeoindex/2017/hom-11840/hom-11840-157.pdf
- https://docs.bvsalud.org/biblioref/homeoindex/2017/hom-11840/hom-11840-158.pdf