1. Correspondence [signed “R. Lipschitz”]. Ann. of Math. (2), 69:247–251, 1959. Attributed to A. Weil.
2. Anatolii Nikolaevich Andrianov and Vladimir Georgievich Zhuravlëv. Modular forms and Hecke operators, volume 145 of Translations of Mathematical Monographs. American Mathematical Society, Providence, RI, 1995. Translated from the 1990 Russian original by Neal Koblitz.
3. Anthony Bak. K-theory of forms, volume 98 of Annals of Mathematics Studies. Princeton University Press, Princeton, N.J., 1981.
4. James William Benham and John Sollion Hsia Spinor equivalence of quadratic forms. J. Number Theory, 17(3):337–342, 1983.
5. Manjul Bhargava. 2009 Arizona Winter School lecture notes on “The parametrization of rings of small rank”.