1. Calcitic microlenses as part of the photoreceptor system in brittlestars;Aizenberg;Nature,2001
2. The puzzling eye of Phacops;Bruton;Special Papers in Palaeontology,2003
3. The functional anatomy of trilobites: musculature and eyes;Campbell;Journal and Proceedings of the Royal Society of New South Wales,1975
4. Schizochroal eyes and vision in some Silurian acastid trilobites;Clarkson;Palaeontology,1966
5. Schizochroal eyes and vision is some phacopid trilobites;Clarkson;Palaeontology,1966