@article{GDZPPN002033070,
title = {On two- and three-element subsets of groups.},
journal = {Aequationes mathematicae},
volume = {22},
year = {1981},
pages = {140-152},
zbl = {0489.20020},
url = {http://dml.mathdoc.fr/item/GDZPPN002033070}
}
Freiman, G.A. On two- and three-element subsets of groups.. Aequationes mathematicae, Tome 22 (1981) pp. 140-152. http://gdmltest.u-ga.fr/item/GDZPPN002033070/