TY  - JOUR
AU  - B.H. Neumann
AU  - G. Baumslag
AU  - W.W. Boone
TI  - Some Unsolvable Problems about Elements and Subgroups of Groups.
JO  - Mathematica Scandinavica
PY  - 1959
SP  - 191
EP  - 201
VL  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1959__7_165713/
ID  - MS2_1959__7_165713
ER  -