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LiTraCon
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<h2 id="external-links">External links</h2> <ul><li><a href="http://www.litracon.hu/">Official website</a></li> <li><a href="http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=US2005183372&F=0">LiTraCon European Patent</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"LiTraCon Official Website". Archived from the original on 18 May 2011. Retrieved 17 May 2011. <a href="https://web.archive.org/web/20110518143342/http://www.litracon.hu/downloads.php" target="_blank">https://web.archive.org/web/20110518143342/http://www.litracon.hu/downloads.php</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Kellogg, Craig, "Space-Age Concrete Blocks That Let You See the Light." New York Times. (Late Edition (East Coast)). New York, N.Y.: Apr 15, 2004. pg. F.3. <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Gomez, Kevin, "LiTraCon shows concrete in new light." Construction Contractor (Australia), Aug. 2005. <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Birch, Amanda (2005-03-18). "Material world". Building Design. Retrieved 2009-01-19. <a href="http://www.bdonline.co.uk/story.asp?sectioncode=453&storycode=3048414&c=1" target="_blank">http://www.bdonline.co.uk/story.asp?sectioncode=453&storycode=3048414&c=1</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Anonymous. "Translucent concrete developed in Europe." Civil Engineering : Magazine of the South African Institution of Civil Engineering. Yeoville: Oct 2005. Vol. 13, Iss. 10; p. 27. Source type: Periodical. ISSN 1021-2000. ProQuest document ID: 958844411. Text Word Count 340. Document URL: [1] (Proquest: subscription required). retrieved Dec. 22, 2006 <a href="/wiki/ISSN_(identifier)" target="_blank">/wiki/ISSN_(identifier)</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Collins, Glenn; Dunlap, David W. (2005-06-07). "Security at Symbol of Resolve: Many Demands on New Ground Zero Tower". The New York Times. Retrieved 2009-01-19. <a href="https://www.nytimes.com/2005/06/07/nyregion/07security.html?pagewanted=3" target="_blank">https://www.nytimes.com/2005/06/07/nyregion/07security.html?pagewanted=3</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> </ol>