Picard Groups of Singular Affine Curves over a Perfect Fields. Roger Wiegand Mathematische Zeitschrift
Tensor products of modules, rigidity and local cohomology. Craig Huneke; Roger Wiegand — 1998 Mathematica Scandinavica
Bounding the Number of Generators of a Module. Roger Wiegand; Wolmer Vasconcelos Mathematische Zeitschrift
Tensor products of modules and the rigidity of Tor. Craig Huneke; Roger Wiegand — 1994 Mathematische Annalen