1. Barry, R.G. & Chorley, R.J. 2003.Atmophere, Weather and Climate, 8th ed. London: Routledge, p.11.
2. Cooper, A. 2012. Water Sensitive Oil Paints in the 20th Century: A Study of the Distribution of Water-soluble Degradation Products in Winsor & Newton Artists' Oil Colour Paint Swatches, with Case Studies from Tate's Collection.Postgraduate Disseration, Courtauld Insitiute of Art, London.