License granted by Heiki Epner (epner@ut.ee) on 2007-08-13T10:26:27Z (GMT): This work is licensed under the Creative Commons Attribution-Noncommercial-Share Alike 2.5 License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA. Käesolevaga kinnitan, selle litsentsiga avaldamiseks vajalikud õigused on olemas ja tegevus on kooskõlas Autoriõiguste seadusega.