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@article{CMUC_1987__28_4_a1, author = {H\'ebert, Michel}, title = {On the reflective hull problem}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {603--606}, publisher = {mathdoc}, volume = {28}, number = {4}, year = {1987}, mrnumber = {928674}, zbl = {0644.18002}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1987__28_4_a1/} }
Hébert, Michel. On the reflective hull problem. Commentationes Mathematicae Universitatis Carolinae, Tome 28 (1987) no. 4, pp. 603-606. http://geodesic.mathdoc.fr/item/CMUC_1987__28_4_a1/