Wulf-Dieter Geyer

Torsion of abelian varieties over large algebraic fields

Wulf-Dieter Geyer, Moshe Jarden, M. Jarden, 2005, Finite Fields Their Appl..

A note on defining transcendentals in function fields

Arno Fehm, Wulf-Dieter Geyer, Arno Fehm, 2009, The Journal of Symbolic Logic.