Jonathan Gil Muñoz, director of the website entitled
El Guardarramista, published an article entitled
El pozo de nieve de La Granja [The ice well at La Granja] in issue 242 of the journal
Apuntes de la Sierra. The article is based on the book
Encerrar el frío: el pozo de nieve de La Granja y el aprovechamiento tradicional de la nieve en el Guadarrama [Keeping the cold inside: the ice well at La Granja Royal Site and the traditional ice industry in the Guadarrama Mountains], co-published by Fundación Juanelo Turriano.
Full article (in Spanish)