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@article{JRAM_1971__251_151162, author = {Joseph E. Valentine and E.Z. Andalafte}, title = {A metric characterization of}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {142--152}, publisher = {mathdoc}, volume = {251}, year = {1971}, zbl = {0223.50014}, url = {http://geodesic.mathdoc.fr/item/JRAM_1971__251_151162/} }
Joseph E. Valentine; E.Z. Andalafte. A metric characterization of. Journal für die reine und angewandte Mathematik, Tome 251 (1971), pp. 142-152. http://geodesic.mathdoc.fr/item/JRAM_1971__251_151162/