This <i>W3C-unspecified</i> <a href="https://en.wikipedia.org/wiki/Vector_images" class="extiw" title="w:Vector images">vector image</a> was created with <a href="https://en.wikipedia.org/wiki/Adobe_Illustrator" class="extiw" title="w:Adobe Illustrator">Adobe Illustrator</a>.
Elian Stefa, Gyler Mydyti, <a href="//commons.wikimedia.org/w/index.php?title=User:The_Hedonist&amp;action=edit&amp;redlink=1" class="new" title="User:The Hedonist (page does not exist)">The Hedonist</a>: Extraction and conversion.
2009
<p><a rel="nofollow" class="external text" href="http://concrete-mushrooms.com/files/concrete-mushrooms-final.pdf">Concrete Mushrooms Project</a><br></p>
Extracted from <a rel="nofollow" class="external text" href="http://concrete-mushrooms.com/files/concrete-mushrooms-final.pdf">concrete-mushrooms-final.pdf</a> and converted to SVG.