used for course on vectors
<a href="//commons.wikimedia.org/w/index.php?title=User:Taltastic&amp;action=edit&amp;redlink=1" class="new" title="User:Taltastic (page does not exist)">Taltastic</a>
2013-05-12 01:18:13
<span class="int-own-work" lang="en">Own work</span>