The extensions of a group
Compositio Mathematica, Tome 5 (1938), pp. 357-367. 
@article{CM_1938__5__357_0,
     author = {Turing, A. M.},
     title = {The extensions of a group},
     journal = {Compositio Mathematica},
     pages = {357--367},
     publisher = {Johnson Reprint Corporation},
     volume = {5},
     year = {1938},
     zbl = {0018.39201},
     language = {en},
     url = {http://www.numdam.org/item/CM_1938__5__357_0/}
}
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  - 
%0 Journal Article
%A Turing, A. M.
%T The extensions of a group
%J Compositio Mathematica
%D 1938
%P 357-367
%V 5
%I Johnson Reprint Corporation
%U http://www.numdam.org/item/CM_1938__5__357_0/
%G en
%F CM_1938__5__357_0
Turing, A. M. The extensions of a group. Compositio Mathematica, Tome 5 (1938), pp. 357-367. http://www.numdam.org/item/CM_1938__5__357_0/