1. Proposal for characterising the airborne sound damping of building elements (in German);Gosele;Gesundheits-Ingeniener,1965
2. A simplified field sound transmission test;Siekman,1971
3. Thomas L. Quindry and Daniel R. Flynn, On a simplified field measurement of noise reduction between spaces. Paper C22Z6. Inter Noise 73. Technical University of Denmark, Copenhagen
4. Airborne sound insulation referred to the A weighting curve;Stephens;Applied Acoustics,1973
5. Rating of Sound Insulation for Dwellings, ISO Recommendation R717, International Organisation for Standardisation