* As always, I am not affiliated with any brands, stores, or persons I may or may not mention and your use of any of these products, links and the like are your own risk and it’s up to you to do your research/homework before you use them. This is just my opinion and experience.
 Paul Cézanne, Letters, ed. John Rewald, 4th ed., New York, 1976, p. 301
 Abstract Painting and Sculpture, Crystal Cubism (1915 – 1916), http://www.abstractpaintingsandsculpture.com/artist/crystal-cubism-art-1915-1916/
 Kissane S., Analysing Cubism, (Pub Crawford Art Gallery 2013) p.12
 Payne, L., Essential Picasso, 1st edn (2000) (Parragon), p.60.
 Hodge, S., Everything you need to know about the greatest artists and their works, 2nd Edn (Quercus Editions Ltd) (2013), p.186
 Artists, Their Lives and Works, 1st edn (2017) (DK Penguin Random House) p.291
 Kissane S., Analysing Cubism, (Pub Crawford Art Gallery 2013) p.13
 A, Graham-Dixon, ‘Art – The Definitive Visual Guide’ (1st edn, Penguin 2008) p.416
 Kissane S., Analysing Cubism, (Pub Crawford Art Gallery 2013) p.14