Bibliography

Jacobi1829

C. Jacobi. Fundamenta nova theoriae functionum ellipticarum. Königsberg, 1829. In Latin. Reprinted with corrections in: C. Jacobi. Gesammelte Werke. 8 volumes. Berlin, 1881-1891. 1. 49-239. Reprinted New York (Chelsea, 1969) and available from the American Mathematical Society.

Andrews1993

G. Andrews, S. Ekhad and D. Zeilberger. A short proof of Jacobi's formula for the number of representations of an integer as the sum of four squares. American Mathematical Monthly 100(1993). 274-276

HardyWright

G. Hardy and E. Wright. An introduction to the theory of numbers. Fifth edition. Oxford (1979).