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WikiPedia: Bóng_bay http://inventors.about.com/library/inventors/blcat... http://physics.about.com/od/classroomphysics/ss/ba... http://www.balloonhq.com/BalloonCouncil/faq.html#s... http://www.glendalewaterandpower.com/news.aspx?ite... http://abclocal.go.com/kabc/story?section=news/sta... http://latimesblogs.latimes.com/lanow/2008/04/myla... http://www.ynetnews.com/articles/1,7340,L-3498487,... http://www.longwood.edu/cleanva/balloonlaws.htm //www.ncbi.nlm.nih.gov/pubmed/23384646 http://www.aqua.org/oceanhealth_inkylegislation.ht...