1. Dingledine, R., Mathewson, N., Syverson, P.: Tor: the second-generation onion router.
https://svn-archive.torproject.org/svn/projects/design-paper/tor-design.pdf
2. Turning funding into more exit relays.
https://blog.torproject.org/turning-funding-more-exit-relays
3. Dingledine, R., Murdoch, S.J.: Performance improvements on Tor or, why Tor is slow and what we’re going to do about it (2009).
https://svn-archive.torproject.org/svn/projects/roadmaps/2009-03-11-performance.pdf
4. Why is tor so slow? (2019).
https://2019.www.torproject.org/docs/faq.html.en#whyslow
5. Nakamoto, S.: Bitcoin: a peer-to-peer electronic cash system.
http://bitcoin.org/bitcoin.pdf