<bdi><a href="https://en.wikipedia.org/wiki/en:Karol_D._Witkowski" class="extiw" title="w:en:Karol D. Witkowski"><span title="Polish-American artist">Karl Witkowski</span></a>
</bdi>
1. <a rel="nofollow" class="external text" href="http://americangallery.wordpress.com/category/witkowski-karl/">americangallery.wordpress.com</a><br>2. <a rel="nofollow" class="external text" href="http://www.sothebys.com/de/auctions/ecatalogue/2006/arcade-paintings-n08257/lot.8.html">Sotheby's New York, 12 Dec 2006, lot 8</a>