Ethereum: Mining and Gas

https://medium.com/cybermiles/running-a-quick-ethereum-private-network-for-experimentation-and-testing-6b1c23605bce

http://www.ethdocs.org/en/latest/mining.html

https://github.com/ethereum/go-ethereum/wiki/Mining

https://github.com/ethereum/go-ethereum/wiki/Private-network

https://masterthecrypto.com/ethereum-what-is-gas-gas-limit-gas-price/