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@article{MZ_1968__108_171096, author = {Solomon Leader}, title = {Extensions {Based} on {Proximity} and {Boundedness.}}, journal = {Mathematische Zeitschrift}, pages = {137--144}, publisher = {mathdoc}, volume = {108}, year = {1968}, zbl = {0169.54002}, url = {http://geodesic.mathdoc.fr/item/MZ_1968__108_171096/} }
Solomon Leader. Extensions Based on Proximity and Boundedness.. Mathematische Zeitschrift, Tome 108 (1968), pp. 137-144. http://geodesic.mathdoc.fr/item/MZ_1968__108_171096/