1. Department of Forest Products Technology and Timber Construction, Salzburg University of Applied Sciences, Markt 136a, 5431 Kuchl, Austria
2. Institute of Physics and Materials Science, Department of Material Sciences and Process Engineering, University of Natural Resources and Life Sciences, Peter-Jordan-Straße 82, 1190 Vienna, Austria
3. Faculty of Furniture Design and Wood Engineering, Transilvania University of Brasov, B-dul. Eroilor nr. 29, 500036 Brasov, Romania