Bruce, Adrian; (2003) Local oxygen transmissibility of disposable contact lenses. Contact lens & anterior eye : the journal of the British Contact Lens Association, 26 (4). pp. 189-96. ISSN 1367-0484 https://researchonline.lshtm.ac.uk/id/eprint/19586 Full text not available from this repository.

Woods, Craig A; (2003) Verification of the vertex powers of varifocal rigid contact lenses. Contact lens & anterior eye : the journal of the British Contact Lens Association, 26 (4). pp. 181-7. ISSN 1367-0484 https://researchonline.lshtm.ac.uk/id/eprint/20453 Full text not available from this repository.