A Proposal for an Occupational Exposure Limit by Jean Parrat, Gerard Donze, Christophe Iseli, Daniel Perret, Catherine Tomicic, and Olivier Schenk
http://annhyg.oxfordjournals.org/cgi/content/abstract/56/3/264?etoc
http://annhyg.oxfordjournals.org/cgi/content/abstract/56/3/264?etoc