1. Baloh, W.R.. Kunley W.E.. Scills W.A. (1976): ‘Quantitative Measure ment of smooth persuits of eye movements’.Annals of Otolaryngology.,85 : 111–119.
2. Claussen, J.V. De Sa (1978) : ‘A clinical study of Human equilibrium by ENG & allied tests’, Bombay, India.Popular Prakashan, 35C, Tardeo Road.
3. Coates, A.C. (1969): ‘Significance of spontaneous nystagmus’.Acta Otolaryngologica,67 : 33–42.
4. Emil De Bois Reymond (1849): Wallace & Rubin (1968) what is ENG, Illinois. U.S.A.,Charles Thomas Publishers.
5. Fitz Gerald, G. and Hallpike CS. (1942): ‘Observations on directional preponderance of Caoric Nystagmus resulting from cerebral lesion’.Brain.65 : 115.