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@article{MZM_1985_38_1_a14, author = {Yu. A. Aminov}, title = {Conditions for polygonal lines and polyhedra in~$E^3$ to be closed}, journal = {Matemati\v{c}eskie zametki}, pages = {132--141}, publisher = {mathdoc}, volume = {38}, number = {1}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1985_38_1_a14/} }
Yu. A. Aminov. Conditions for polygonal lines and polyhedra in~$E^3$ to be closed. Matematičeskie zametki, Tome 38 (1985) no. 1, pp. 132-141. http://geodesic.mathdoc.fr/item/MZM_1985_38_1_a14/