1. Cox, David , Primes of the Form x2 + ny2, Fermat, Class Field Theory, and Complex Multiplication, John Wiley & Sons, Inc (1989)
2. On the least primitive root of a prime
3. Iftene, Sorin , Some Connections Between Primitive Roots and Quadratic Non-Residue Modulo a Prime, https://eprint.iacr.org/2012/470.pdf
4. Deterministic Algorithm Computing All Generators: Application in Cryptographic Systems Design
5. Vinogradov, I.M. , On the least primitive root of a prime, Dokl. Akad. Nauk, S.S.S.R., 7–11 (1930)