1. Silicone plug for punctal occlusion.;Adams;Trans Ophthalmol Soc UK,1978
2. The punctum plug: evaluation of a new treatment for the dry eye.;Freeman;Trans Am Acad Ophthalmol Otolaryngol,1975
3. Lacrimal Gland Tear Film and Dry Eye Syndromes.;Herrick,1994
4. Canalicular occlusion. Dakryon Dimensions.;Herrick,1992
5. Iatrogenic complications related to the use of Herrick Lacrimal Plugs.;White;Ophthalmology,2001