Test elements and test rank of a free metabelian group.
The classification of groups in which every product of four elements can be reordered
The Soluble Length of Soluble Linear Groups.
Topological dimensions for -groups.
Torsionsfreie Gruppen, deren Untergruppen alle subnormal sind.
Two decidable Markov properties over a class of solvable groups.
Two Theorems on Polycyclic Groups.