1. Power changes in soft contact lenses due to bending;Bennett;Ophthal. Optician,1976
2. Optics of Contact Lenses;Bennett,1985
3. Aspherical and continuous curve contact lenses: Parts 1–4;Bennett;Optom. Today,1988
4. BS EN ISO 18369-1 (2017) Ophthalmic optics – Contact lenses – Part 1: Terminology.
5. BS EN ISO 18369-2 (2017) Ophthalmic optics – Contact lenses – Part 2: Tolerances.