1. ‘Recruiting collapsed lung through collateral channels with positive end-expiratory pressure’;Andersen;Scandinavian Journal of Respiratory Diseases,1979
2. ‘Autogenic drainage – The German approach’;David,1991
3. Dynamic Bronchoscopy;de Kock,1977
4. ‘Exercise in cystic fibrosis adults’;Dodd,1991
5. ‘Positive expiratory pressure (PEP) mask’;Falk,1991