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2. Thermal diffusivity of superconducting YBa2Cu3O7−x
3. 3) H. W. Deem and W. D. Wood: Ref. Sci. Instr. 33 (1962) 1107.
4. 4) H. Vargas and L. C. M. Miranda: "Photoacoustic and Thermal Wave Phenomena in Semiconductors" Chap.3, A.Mandelis (eds.) (North-Holland, 1987).
5. 5) R. S. Carpenter: NAA-SR-TDR-7643, I-20, (1962).