Literatuur
- Meyer, Franz Sales, Handbook of Ornament. A grammar of art industrial and architectural designing in all its branches for practical as well as theoretical use. New York (Dover), 1957 [herdruk van 4e druk uit 1892; 1e druk: 1888] [548 blz. ISBN -] Hierin "The Laurel, and the Olive": blz. 43, 44-45