1. A New History of India;Wolpert,1982
2. Secrets of Sleep;Borbely,1984
3. Mazumdar S. Ramayana., Calcutta: Deva Shahittya Kutir, 1979.
4. Sleep and Its Disorders;Parkes,1985
5. The historical development of the deafferentation hypothesis of sleep;Moruzzi;Proc Am Philosoph Soc,1964