https://blog.aventus.io/working-with-strings-in-solidity-473bcc59dc04
- https://medium.com/coinmonks/creating-smart-contracts-with-smart-contract-d54e21d26e00
- https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357
- https://medium.com/coinmonks/decompiling-ethereum-smart-contracts-b283ae80f8a0
- https://medium.com/coinmonks/the-business-of-sending-transactions-on-ethereum-e79fd9a2b88