1. Sleep and Wakefulness;Kleitman,1962
2. The relation of arterial pressure to sleep and arousal in man;Pickering;J. Physiol. (Lond.),1967
3. Sleep and blood pressure;Littler;Br. Med. J.,1975
4. Circadian variation of blood pressure;Millar Craig;Lancet,1978
5. The variability of arterial pressure;Littler;Am. Heart J.,1978