https://books.google.com.ar/books?hl=es&lr=&id=lbrIIbxlAp4C&oi=fnd&pg=PA252&dq=Afasia&ots=5iqrg80ehz&sig=JChc1eFbXZ6BcpPhQjT5dMj7RvY#v=onepage&q=Afasia&f=false