Original paper by Gauss on gaussian integers

Question

Could anyone provide me with the title and date of Gauss's paper where he first introduces gaussian integers and proves their unique factorization? If you could also provide me with his exact proof it would be perfect.

Thanks in advance.

Answer 1

Gauss introduced the Gaussian integers in his $1832$ work named Theoria residuorum biquadraticorum. For translations of the latin text see here.