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  • "Pygmy Sharks." sheppardsoftware.com, 2008. http://www.sheppardsoftware.com/content/animals/animals/fish/shark_pygmyshark.htm
  • "Spined Pigmy Shark." discoverychannel.co.uk, 2008. http://www.discoverychannel.co.uk/sharks/detail/pygmy/index.shtml
  • "Spined Pygmy Shark." nmh.org, 2008. http://www.nhm.org/research/fishes/sharksff/sharkimg/sff5.html
  • "Spined Pygmy Shark." sharks.findouthow.org, 2008. http://sharks.findoutnow.org/article-13-spined-pygmy-shark.html
  • Swaminathan, Nikhil. "Not So Tall Tale: Why Pygmies Evolved to Be Shorter." Scientific American. Dec. 12, 2007. http://www.sciam.com/article.cfm?id=why-pygmies-evolved-to-be-shorter