Physical working conditions as covered in European monitoring questionnaires oleh Tore Tynes, Cecilie Aagestad, Sannie Vester Thorsen, Lars Louis Andersen, Merja Perkio-Makela, Francisco Javier Pinilla García, Luz Galiana Blanco, Greet Vermeylen, Agnes Parent-Thirion, Wendela Hooftman, Irene Houtman, Falk Liebers, Hermann Burr, Maren Formazin