PT Journal AU Zhang, T Bai, S Zhang, Y Thibaut, B TI Viscoelastic properties of wood materials characterized by nanoindentation experiments SO Wood Science and Technology JI Wood Sci. Technol. PY 2012 BP 1003 EP 1016 VL 46 IS 5 DI 10.1007/s00226-011-0458-3 ER