1. Studies of the movements of the eyelids in animals;BLOUNT, W.P.;Quart. JI. of Expl. Physiol,1927
2. Worth's squint. Seventh edition;CHAVASSE, F.B.,1939
3. Text-book of Ophthalmology. Vol;DUKE-ELDER, SIR W. S,1932
4. On the acts of closing and opening the eyes.;HAL-L, A.J.;Brit. Ji. 05hthal,1936
5. 1930. Looking and seeing.";HOLMES, G.O.R.D.O.N.Trans Ophthat Soc U.K.; L, Vol;Irish JI. of Med. Sci; The cerebral integration of the ocular movements,1936