1. A. Hukka and V. Tarvainen, “Höyryn käyttö sahatavaran kuivauksessa,”VTT julkaisuja826 (1997).
2. T. J. Morén, “Heating and conditioning by steaming during low temperature drying,” inProc. 4th IUFRO Wood Drying Conf., A. N. Haslett and F. Laytner, Eds., pp. 341–348, New Zealand Forest Research Inst., Rotorua, New Zealand (1994).
3. Theory of speckle dependence on surface roughness*
4. R. Silvennoinen, K.-E. Peiponen, and T. Asakura, “Diffractive optical elements in materials inspection,” inThe International Trends in Optics and Photonics ICO IV, Part VI: Optical Metrology (Optical Systems), T. Asakura, Ed. pp. 282–293, Springer-Verlag, Berlin, (1999).
5. Inspection of orientation of micro fibres in dried wood by a diffractive optical element