TY  - JOUR
AU  - Turing, A. M.
TI  - The extensions of a group
JO  - Compositio Mathematica
PY  - 1938
SP  - 357
EP  - 367
VL  - 5
PB  - Johnson Reprint Corporation
UR  - http://www.numdam.org/item/CM_1938__5__357_0/
LA  - en
ID  - CM_1938__5__357_0
ER  -