1. V. BUCUR, in ?Acoustics of Wood? (CRC Press, Boca Raton, New York, USA, 1995) p. 221.
2. Z. CHEN and B. GABBITAS, in First international conference of the Europe Society of Wood Mechanics, Lausanne, Switzerland, 19?21 April, 2001, p. 393.
3. R. W. RICE and C. SKAAR, Wood Sci. Techn. 24 (1990) 123.
4. D. WU and G. BUSSE, TAPPI 1995 Europ. Plast. Lamin. Symp. 79(8) (1995) 119.
5. G. DILL-LANGER and S. AICHER, in Proceedings of COST Action E8 on Wood and Wood Fiber Composites, Stuttgart, Germany, 13?15 April, 2000, p. 93.