A property of the Sorgenfrey line
Heath, Robert W. ; Michael, Ernest A.
Compositio Mathematica, Tome 23 (1971), p. 185-188 / Harvested from Numdam
@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},
     volume = {23},
     year = {1971},
     pages = {185-188},
     mrnumber = {287515},
     zbl = {0219.54033},
     language = {en},
     url = {http://dml.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) pp. 185-188. http://gdmltest.u-ga.fr/item/CM_1971__23_2_185_0/

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