Ryo, as a fork from Monero which itself was initially based on the CryptoNote protocol, inherits all whitepapers and academic studies from CryptoNote and Monero Research Lab. Additionally, Ryo has pioneered technologies such as Cryptonight-Heavy / Cryptonight-GPU mining algorithms and Uniform Payment ID. Some of them are already used by numerous other Monero forks.
Additionally Ryo dev team has implemented ECC library with multithreading support in its core binaries that gives notable speedup to wallet blockchain scanning process.
CryptoNote