Kjersti Steinsvag, Karen S. Galea, Kirsti Kruger, Vegard Peikli, Araceli Sanchez-Jimenez, Esther Satvedt, Alison Searl, John W. Cherrie and Martie van Tongeren
The Annals of Occupational Hygiene 55 ( 4 ): 347 - 356 , 2011