On the inverse limit of free nilpotent groups. G. Baumslag; U. Stammbach — 1977 Commentarii mathematici Helvetici
On varieties generated by a finitely generated group. H. Neumann; B.H. Neumann; G. Baumslag Mathematische Zeitschrift
Some Unsolvable Problems about Elements and Subgroups of Groups. B.H. Neumann; G. Baumslag; W.W. Boone — 1959 Mathematica Scandinavica
Isoperimetric inequalities and the homology of groups. G. Baumslag; H. Short; C. III. Miller — 1993 Inventiones mathematicae