The Riemann Hypothesis in Characteristic p in Historical Perspective Peter Roquette E-Book (pdf)

The Hasse - Noether Correspondence 1925 -1935 Peter Roquette, Franz Lemmermeyer E-Book (pdf)

Emil Artin and Helmut Hasse Günther Frei, Franz Lemmermeyer, Peter J. Roquette E-Book (pdf)