1. Pfaff G., [Special Effect Pigments: Technical Basics and Applications], 2nd ed. Vincentz Network, Hannover, (2008)
2. Effektvolles messen;Cramer,2001
3. Appearance measurements of goniochromatic colours;Atamas,2012
4. CIE 15:2004, “Colorimetry”, 3rd ed., International Commission on Illumination (2004)
5. Es glitzert wie am Sternenhimmel;Cramer,2012