1. Flannagan M, Sivak M (1989) An improved braking indicator. SAE Tech Pap 890189
2. Bäumer S (2005) Handbook of plastic optics. Wiley-VGH, Weinheim
3. Stauss B (2011) High precision plastic lenses-styling, optical design, manufacturing process. Proceedings of ISAL, Darmstadt
4. Automotive Learning Center. Plastics & today’s automobiles: car lighting systems. American Chemistry Council
5. Vorburger TV (1990) Methods for characterizing surface topography. National Institute of Standards and Technology, Gaithersburg, p 20899