R. Derkx

Changing prevalence of respiratory symptoms and treatment in Dutch school children: 1989-1997.

G. Swaen, O. V. van Schayck, M. Mommers, 2002, Primary care respiratory journal : journal of the General Practice Airways Group.

Indoor environment and respiratory symptoms in children living in the Dutch-German borderland.

M Weishoff-Houben, W Dott, G. Swaen, 2005, International journal of hygiene and environmental health.