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@article{TM_1965_76_a12, author = {Yu. D. Burago}, title = {The closure of a~class of manifolds with bounded curavature}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {141--147}, publisher = {mathdoc}, volume = {76}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1965_76_a12/} }
Yu. D. Burago. The closure of a~class of manifolds with bounded curavature. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Two-dimensional manifolds of bounded curvature. Part II. Collection of articles on the intrinsic geometry of surfaces, Tome 76 (1965), pp. 141-147. http://geodesic.mathdoc.fr/item/TM_1965_76_a12/