1. Institute of Chemistry University of Tartu Ravila 14a 50411 Tartu Estonia
2. National Institute of Chemical Physics and Biophysics Akadeemia tee 23 10213 Tallinn Estonia
3. Department of Chemical and Biomolecular Engineering University of California Berkeley, Gilman Hall 94720 Berkeley California USA
4. Institute of Physics University of Tartu W. Ostwaldi Str 1 50411 Tartu Estonia
5. Latvian State Institute of Wood Chemistry Dzerbenes street 27 Riga LV 1006 Latvia
6. State research institute Center for Physical Sciences and Technology Savanorių ave. 231 LT 02300 Vilnius Lithuania