1. Counterparty. https://counterparty.io/
2. Developer guide - bitcoin. https://bitcoin.org/en/developer-guide
3. summa-tx/bitcoin-spv: utilities for Bitcoin SPV proof verification on other chains. https://github.com/summa-tx/bitcoin-spv/
4. Andresen, G.: BIP 0016: Pay to Script Hash, January 2012. https://github.com/bitcoin/bips/blob/master/bip-0016.mediawiki
5. Lecture Notes in Computer Science;M Bartoletti,2017