1. Secrets of Sleep;Borbely,1984
2. A New History of India;Wolpert,1982
3. Ramayana;Mazumda,1979
4. Sleep and Its Disorders;Parkes,1985
5. True causes of sleep—a hypnogenic substance as evidenced in the brain of sleep-deprived animals;Ishimori;Igakkai Zasshi (Tokyo),1909