@article{1183533607,
author = {Chang, Bai Ching},
title = {Which abelian groups can be fundamental groups of regions in euclidean spaces?},
journal = {Bull. Amer. Math. Soc.},
volume = {78},
number = {4},
year = {1972},
pages = { 470-473},
language = {en},
url = {http://dml.mathdoc.fr/item/1183533607}
}
Chang, Bai Ching. Which abelian groups can be fundamental groups of regions in euclidean spaces?. Bull. Amer. Math. Soc., Tome 78 (1972) no. 4, pp. 470-473. http://gdmltest.u-ga.fr/item/1183533607/