1. Acoustical holography in spherical coordinates for noise source identification;DeVries,1944
2. Identification of multipole sound sources;Zhukov;Soviet Physics and Acoustics,1990
3. Method for measuring acoustic radiation fields;Weinreich;Journal of the Acoustical Society of America,1980
4. Spherical acoustical holography using sound intensity measurements: theory and simulation;Laville;Acustica,1992