Website: https://sidera.io/
Whitepaper: https://sidera.io/docs/v1.0/Sidera_Whitepaper.pdf
ANN: https://bitcointalk.org/index.php?topic=4756894
Twitter: https://twitter.com/siderabc
Facebook: https://www.facebook.com/siderablockchain/
Telegram: https://t.me/sideraofficial
Linkedin: https://www.linkedin.com/company/sidera-blockchain-technologies
Reddit: https://www.reddit.com/user/SideraBlockchain