Author not established. País. Date not established. EHREA archive: /library/documents/doc-df7c639d319a80937cb2825d/
[1] País. Original source: http://www.ehrea.org/08i.pdf. Preserved original: /library/originals/24de3bb507447b8e40cbbda943828f6b87232e04a27bc2c1a058b664b95411d0.pdf. SHA-256: 24de3bb507447b8e40cbbda943828f6b87232e04a27bc2c1a058b664b95411d0