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@article{IM_1982__66_142890, author = {G.C. Hamrick and David C. Royster}, title = {Flat {Riemannian} {Manifolds} are {Boundaries.}}, journal = {Inventiones mathematicae}, pages = {405--414}, publisher = {mathdoc}, volume = {66}, year = {1982}, zbl = {0468.57025}, url = {http://geodesic.mathdoc.fr/item/IM_1982__66_142890/} }
G.C. Hamrick; David C. Royster. Flat Riemannian Manifolds are Boundaries.. Inventiones mathematicae, Tome 66 (1982), pp. 405-414. http://geodesic.mathdoc.fr/item/IM_1982__66_142890/