Further Reading
- Rudolf Dröschel, Jürgen Evers, Hans Ottomeyer: The Wittelsbach Blue, in: Gems and Gemology ISSN 0016-626X, 44 (2008), P. 348–363
- Jürgen Evers, Leonhard Möckl, Heinrich Nöth: Der Wittelsbacher und der Hope-Diamant, in: Chemie in Unserer Zeit ISSN 0009-2851, 46 (2012), P. 356–364
- Wise, Richard W., Secrets Of The Gem Trade, The Connoisseur's Guide To Precious gemstones, isbn:0-9728223-8-0 Fancy Blue Diamonds, p.235-236
Read more about this topic: Wittelsbach-Graff Diamond
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