Martín Martínez, J. V., and J. L. Maravall Llagaría. “From Digitization Protocols to Critical Edition of Images”. Revista De Bellas Artes. Artes Plásticas, Estética, Diseño E Imagen, no. 12, July 2014, pp. 51-78, https://www.ull.es/revistas/index.php/artes/article/view/6640.