Agreement of the author's Oleg Buryan to the placement of these files (images) under this license: <a class="external free" href="https://en.wikipedia.org/wiki/Buryan_Oleg">http://en.wikipedia.org/wiki/Buryan_Oleg</a>
<a href="//commons.wikimedia.org/wiki/User:CheloVechek" title="User:CheloVechek"><small><sub style="color:blue">chelo</sub></small>Vechek</a> / <a href="//commons.wikimedia.org/wiki/User_talk:CheloVechek" title="User talk:CheloVechek"><small><sup style="color:green">talk</sup></small></a>
2009-08-13
<span class="int-own-work" lang="en">Own work</span>