1. Sleep and sleep disturbance in geriatric psychiatry;Ginzberg;J. Am. Geriatrics Soc.,(July) 1955
2. Insomnia in the aged;Sagal;Geriatrics,(July) 1958
3. Braines , Prof May 18, 1957 Sagal (2)
4. A survey of the sleep habits of 509 men of distinction;Laird;Am. Med.,(May) 1931
5. Insomnia;Solomon;New England J. Med.,(Oct. 18) 1956