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@article{JRAM_1966__222_150731, author = {Paul W. jr. Liebnitz}, title = {Neighborhood extensions of continuous maps.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {58--68}, publisher = {mathdoc}, volume = {222}, year = {1966}, zbl = {0138.17603}, url = {http://geodesic.mathdoc.fr/item/JRAM_1966__222_150731/} }
Paul W. jr. Liebnitz. Neighborhood extensions of continuous maps.. Journal für die reine und angewandte Mathematik, Tome 222 (1966), pp. 58-68. http://geodesic.mathdoc.fr/item/JRAM_1966__222_150731/