Kirby, Jo and David Saunders. "Fading and Colour Change of Prussian Blue: Methods of Manufacture and the Influence of Extenders." National Gallery Technical Bulletin 25/1 (January 2004): 73-99.

Kirby, Jo and David Saunders. "Fading and Colour Change of Prussian Blue: Methods of Manufacture and the Influence of Extenders." National Gallery Technical Bulletin 25/1 (January 2004): 73-99.