1. Definition and diffusion in rooms;Meyer;J. Acoust. Soc. Amer.,1954
2. Architectural Acoustics;Knudsen,1947
3. A method for the calculation of speech intelligibility under conditions of reverberation and noise;Janssen;Acustica,1957
4. Optimum reverberation time for speech rooms based on hearing characteristics;Lochner;Acustica,1960