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References
- ↑ Zener, Clarence (1937-08-01). "Internal Friction in Solids. I. Theory of Internal Friction in Reeds". Physical Review. American Physical Society (APS). 52 (3): 230–235. Bibcode:1937PhRv...52..230Z. doi:10.1103/physrev.52.230. ISSN 0031-899X.
- ↑ Zener, Clarence (1938-01-01). "Internal Friction in Solids II. General Theory of Thermoelastic Internal Friction" (PDF). Physical Review. American Physical Society (APS). 53 (1): 90–99. Bibcode:1938PhRv...53...90Z. doi:10.1103/physrev.53.90. ISSN 0031-899X.