@article{1181073166,
author = {Goeters, H.P.},
title = {When do two groups always have isomorphic extension groups?},
journal = {Rocky Mountain J. Math.},
volume = {20},
number = {4},
year = {1990},
pages = { 129-144},
language = {en},
url = {http://dml.mathdoc.fr/item/1181073166}
}
Goeters, H.P. When do two groups always have isomorphic extension groups?. Rocky Mountain J. Math., Tome 20 (1990) no. 4, pp. 129-144. http://gdmltest.u-ga.fr/item/1181073166/