A. Pfister

Systems of quadratic forms

A. Pfister, 1979 .

Quadratic forms with applications to algebraic geometry and topology

A. Pfister, 1995 .

On Sums of Squares and on Elliptic Curves over Function Fields

J. Cassels, W. Ellison, A. Pfister, 1971 .

On the level of projective spaces

S. Stolz, A. Pfister, 1987 .

An elementary proof of Hilbertʼs theorem on ternary quartics

Claus Scheiderer, Albrecht Pfister, A. Pfister, 2010, 1009.3144.

Small zeros of quadratic forms over algebraic function fields

A. Pfister, 1997 .