1. Skype Security, Microsoft Skype,
2. MTProto Mobile Protocol Description, Telegram,
3. New directions in cryptography
4. Standards for efficient cryptography. SEC 1: “Elliptic Curve Cryptography”, Certicom Corp., 20 (2000).
5. Mpir.Net, “Multiple Precision Integers and Rationals”, 〜http://wezeku.github.io/Mpir.NET/〞