A character approach to Looijenga's invariant theory for generalized root systems
A Magnus-Witt type isomorphism for non-free groups.
A nilpotent ideal in the Lie rings with automorphism of prime order.
A note on groups with torsion-free abelianization and trivial multiplicator.
Adjoint groups and the Mal'cev correspondence (a tale of four functors)
An expansion of the Jones representation of genus 2 and the Torelli group.