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How to Build a Device That Cannot Be Built [pdf]
- gruez 11y agocached version (it shows up as forbidden for me): https://webcache.googleusercontent.com/search?q=cache:http://www.csee.umbc.edu/~lomonaco/pubs/Unbuildable.pdf&ie=utf-8&oe=utf-8&gws_rd=cr&ei=IqNfVvWGK4y-aOiznkA https://webcache.googleusercontent.com/search?q=cache:http:/...