https://archive.org/stream/librodelesforado00boni/librodelesforado00boni_djvu.txt
https://www.bne.es/es/blog/blog-bne/tristan-de-leonis
https://www.facebook.com/share/v/1B29LvVD97/
https://bdh.bne.es/bnesearch/detalle/3121320
https://youtube.com/shorts/QzcuSVIJ4qY?si=JDlxVEeVvh3lFYjs https://es.wikipedia.org/wiki/Trist%C3%A1n_el_Joven
