Entries of Zhang, Digen on the publication server

Knebusch, Manfred and Zhang, Digen (2005) Convexity, valuations and Prüfer extensions in real algebra. Documenta Mathematica - Journal der Deutschen Mathematiker-Vereinigung 10, pp. 1-109. Fulltext not available.

Knebusch, Manfred and Zhang, Digen (2002) Manis valuations and relative Prüfer rings I: A new chapter in commutative algebra. Lecture Notes in Mathematics. Springer, Berlin. ISBN 354043951X; 978-3540439516. Fulltext not available.

Knebusch, Manfred and Zhang, Digen (1996) Manis valuations and relative Prüfer rings I. Documenta Mathematica - Journal der Deutschen Mathematiker-Vereinigung 1, pp. 149-197. Fulltext not available.