1. Airdrop Vulnerability. https://blog.peckshield.com/2018/07/24/fomo3d/
2. CoinMarketCap, a Browser for Cryptocurrency Market Cap. https://coinmarketcap.com/currencies/ethereum/
3. CryptoKitties Official Website. https://www.cryptokitties.co/
4. CryptoMidwives Introduction. https://medium.com/block-science/exploring-cryptokitties-part-2-the-cryptomidwives-a0df37eb35a6
5. DApp, Crypto Countries. https://cryptocountries.io/