1. Group theory and the bell;Perrin;Journal of Sound and Vibration,1973
2. Torsional vibrations of bells;Charnley;Journal of Sound and Vibration,1975
3. The suppression of warble in bells;Perrin;Musical Instrument Technology,1978
4. Characteristics of bell vibrations;Tyzzer;Journal of the Franklin Institute,1930
5. Acustische Untersuchungen an Kirchenglocken;Grützmacher;Acustica,1965