1 Department of Wood-Based Composites, Cellulose and Paper, Ukrainian National Forestry University, 790 57 Lviv, Ukraine.
2 Department of Wood Science and Technology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic.
3 Department of Furniture and Wood Products, Technical University in Zvolen, T.G. Masaryka 24, 960 01 Zvolen, Slovakia.