1. Borevich, Z.I., Shafarevich, I.R. Number theory (Nauka, Moscow, 1985) [in Russian].
2. Barbeau, E.J. Pell's Equation (Springer–Verlag, New York, 2003).
3. Hambleton, S.A., Williams, H.C. Cubic Fields with Geometry (Springer International Publishing, 2018).
4. van der Waerden Algebra (Nauka, Moscow, 1976) [in Russian].
5. Kostrikin, A.I. Introduction to algebra. P. III (Fizmatlit, Moscow, 2001) [in Russian].