Carl Friedrich Gauss' Untersuchungen ?ber H?here Arithmetik - H. Maser - Google Books

https://books.google.de/books?id=1csMAwAAQBAJ&pg=PA334

Disquisitiones arithmeticae. Theorematis arithmetici demonstratio nova. Summatio quarumdam serierum singularium. Theorematis fundamentalis in doctrina de residuis quadraticis demonstrationes et ampliationes novae. Theoria residuorum biquadraticorum,…