Vera van Kampen, Ingrid Sander, Verena Liebers, Anja Deckert, Heinz-Dieter Neumann, Martin Buxtrup, Eckart Willer, Christian Felten, Udo Jackel, Kerstin Klug, Thomas Bruning, Monika Raulf and Jurgen Bunger
The Annals of Occupational Hygiene 58 ( 6 ): 693 - 706 , 2014