Any Expressionism For Reference?

Answer 1

1. Matisse the Master by Hilary Spurling, page 26, Penguin Books 2005.
2. Van Gogh's letter to his brother Theo from Arles, dated 11 August 1888
3. Matisse and His Models by Hilary Spurling, published in Smithsonian Magazine, October 2005
4. Bright Earth by Philip Ball, page 219.