1. https://www.coindesk.com/ledger-legacy-trust-to-offer-institutional-custody-of-erc-20-tokens2. https://www.ccn.com/crypto-stealing-gustuff-trojan-unmasks-alarming-banking-vulnerabilities3. https://twitter.com/KuCoinUpdates/status/11108259132168437814. http://www.rosbalt.ru/moscow/2019/03/28/1772298.html5. http://www.consultant.ru/document/cons_doc_LAW_320398/