Cpt S.... There was a study sponsered by BALPA in the UK as follows:
Pilot Fatigue - Effects, Countermeasures and Regulations. 936. Dr. J. C. Wilson, Capt A. Elsey, Dr. P. Hunton. Leicester University, presented at the eighth International Symposium on Aviation Psychology, Culumbus, Ohio, USA (1996?). you should be able to find it online, if not pm me.
Again BALPA sponsered another study on Pilot Fatique in or around 2007. The primary researcher and author of the report was Dr. Simon Bennett, again of Leicester University, you should be able to obtain a copy of that study either through BALPA or Simon Bennett.
Just to add here is a link:
http://www2.le.ac.uk/offices/press/p...-close-to-home