1. https://www.vesti.ru/doc.html?id=355318&fr=1&p=41&sort=2
2. https://www.newsbtc.com/2019/08/05/litecoin-surges-14-in-post-halving-spike-next-one-in-2023/
3. https://www.coinness.com/news/364810
4. https://www.cryptoglobe.com/latest/2019/08/mastercard-job-ads-show-it-s-hiring-for-cryptocurrency-wallet-solutions/
5. https://en.ethereumworldnews.com/apple-credit-card-customer-agreement-prohibits-purchase-of-crypto/