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http://www.zdnet.com/blog/emergingtech/the-genetic-secrets-of-the-black-widow-spider/603
http://tolweb.org/Theridiidae
http://www.pacific.edu/Academics/Schools-and-Colleges/College-of-the-Pacific/From-Black-Widows-to-Bulletproof-Vests.html
http://schatzie-speaks.hubpages.com/hub/The-patriotic-black-widow-spiders-of-World-War-II
http://www.nytimes.com/2002/01/18/science/18SILK.html
http://www.britannica.com/EBchecked/topic/559817/spider/47803/Internal-features
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0012804
http://www.zdnet.com/blog/emergingtech/the-genetic-secrets-of-the-black-widow-spider/603
http://tolweb.org/Theridiidae
http://www.pacific.edu/Academics/Schools-and-Colleges/College-of-the-Pacific/From-Black-Widows-to-Bulletproof-Vests.html
http://schatzie-speaks.hubpages.com/hub/The-patriotic-black-widow-spiders-of-World-War-II
http://www.nytimes.com/2002/01/18/science/18SILK.html
http://www.britannica.com/EBchecked/topic/559817/spider/47803/Internal-features