1. Altered sleep/wake patterns and circadian rhythms;Åkerstedt;Acta Physiologica Scandinavia,1979
2. The GLIM system; release 3;Baker,1978
3. Temperament and time of day;Blake,1971
4. Non-parametric measures of sensory efficiency for sustained monitoring tasks;Craig;Human Factors,1979
5. The psychology of vigilance;Davies,1982