1. The best bitcoin mining pools.
https://www.bitcoinmining.com/bitcoin-mining-pools/
. Accessed June 2020
2. The deep web is the 99% of the internet you can’t google.
https://curiosity.com/topics/the-deep-web-is-the-99-of-the-internet-you-cant-google-curiosity/
. Accessed June 2020
3. Google’s search knows about over 130 trillion pages.
https://searchengineland.com/googles-search-indexes-hits-130-trillion-pages-documents-263378
. Accessed June 2020
4. How to escape your political bubble for a clearer view.
https://www.nytimes.com/2017/03/03/arts/the-battle-over-your-political-bubble.html
. Accessed June 2020
5. Internet growth statistics.
https://www.internetworldstats.com/emarketing.htm
. Accessed June 2020