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@article{CM_1971__23_2_185_0, author = {Heath, Robert W. and Michael, Ernest A.}, title = {A property of the {Sorgenfrey} line}, journal = {Compositio Mathematica}, pages = {185--188}, publisher = {Wolters-Noordhoff Publishing}, volume = {23}, number = {2}, year = {1971}, mrnumber = {287515}, zbl = {0219.54033}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1971__23_2_185_0/} }
Heath, Robert W.; Michael, Ernest A. A property of the Sorgenfrey line. Compositio Mathematica, Tome 23 (1971) no. 2, pp. 185-188. http://geodesic.mathdoc.fr/item/CM_1971__23_2_185_0/