1. Trabeculectomy: Preliminary report of a new method;Cairns, J.E.;Am J Ophthalmol,1968
2. Failure of filtration operations in the Africans;Welsh, N.H.;Br J Ophthalmol,1970
3. A new technique for opening the canal of Schlemm;Smith, R.J.H.;Br J Ophthalmol
4. Trabeculectomy ab externo;Allen, L.; Burian, H.M.;Am J Ophthalmol,1962
5. Epicrital consideration of 300 cases of trabeculectomy 'ab externo';Harms, H.; Danheim, R.;Trans Ophthalmol Soc UK