References
- Biomedical Foundations of Ophthalmology, Vol.2, Philadelphia, Harper & Row, Chapt. 19, pp 1–24.
- Hurvich LM: Color Vision, Sunderland, MA, Sinquer Assoc., Chapt. 1, pp 3–6.
- Duane TD, Jaeger EA: Clinical Ophthalmology, Philadelphia, Harper & Row, Vol. 3, Chapt. 6, pp 1–19.