@article{GDZPPN002097982,
title = {Flat Riemannian Manifolds are Boundaries.},
journal = {Inventiones mathematicae},
volume = {69},
year = {1982},
pages = {405-414},
zbl = {0468.57025},
url = {http://dml.mathdoc.fr/item/GDZPPN002097982}
}
Hamrick, G.C.; Royster, David C. Flat Riemannian Manifolds are Boundaries.. Inventiones mathematicae, Tome 69 (1982) pp. 405-414. http://gdmltest.u-ga.fr/item/GDZPPN002097982/