Happened to come across an overview article on fatigue and safety recently. If anyone is interested:
http://www.researchgate.net/publicat...c2d136471f.pdf (or
http://www.google.at/url?sa=t&rct=j&...51156542,d.bGE). If neither link works for you, PM me for a copy (please provide an e-mail address I can send a 540kb-Attachment to).