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@article{MS2_1965__17_165930, author = {Jack L. Hursch and Jr.}, title = {Proximity and {Height.}}, journal = {Mathematica Scandinavica}, pages = {150--160}, publisher = {mathdoc}, volume = {17}, year = {1965}, zbl = {0135.40805}, url = {http://geodesic.mathdoc.fr/item/MS2_1965__17_165930/} }
Jack L. Hursch; Jr. Proximity and Height.. Mathematica Scandinavica, Tome 17 (1965), pp. 150-160. http://geodesic.mathdoc.fr/item/MS2_1965__17_165930/