Computing Presentations for Subgroups of Polycyclic Groups and of Context-Free Groups.

Norbert Kuhn Klaus Madlener Friedrich Otto Computing Presentations for Subgroups of Polycyclic Groups and of Context-Free Groups. 287-316 1994 5 Appl. Algebra Eng. Commun. Comput. db/journals/aaecc/aaecc5.html#KuhnMO94