1. The ocular surface and its symbolism;Murube;Ocul Surf,2007
2. Hippocrates of Kos. Predictions II. V-IV century BC
3. Etymology of the term “tear”;Murube;Ocul Surf,2005
4. De Medicina. Liber VII, 7. circa 35 AD. Published in Vol III of the Loeb Classical Library;Celsus,1935
5. Lexicon medicum graecolatinum;Blancardus,1683