1. The epidemiology of fatigue;Lewis;J Epidemiol Community Health,1992
2. Reviving the diagnosis of neurasthenia;Hickie;Psychol Med,1997
3. Muscle strength, endurance and recovery in the post-infection fatigue syndrome;Lloyd;J Neurol Neurosurg Psychiatry,1988
4. Muscle endurance, twitch properties, voluntary activation and perceived exertion in normal subjects and patients with chronic fatigue syndrome;Lloyd;Brain,1991
5. Is a fatigue test possible?;Muscio;Br J Psychol,1921