1. https://cointelegraph.com/news/quadrigacx-reportedly-stored-eth-on-kraken-bitfinex-and-poloniex-research-finds
2. https://www.coindesk.com/blockstream-releases-lightning-upgrade-with-new-plugin-functionality
3. https://360tv.ru/news/obschestvo/umer-vladelets-odnoj-iz-krupnejshih-kriptoferm-v-rossii/
4. https://www.reddit.com/r/SingularityNet/comments/awh0rd/singularitynet_agi_successfully_launches_beta/
5. https://www.cryptoglobe.com/latest/2019/02/bitmex-update-terms-of-service-new-focus-on-unauthorized-citizens/