A note on point-set operators
Halfar, Edwin
Portugaliae mathematica, Tome 10 (1951), p. 103-104 / Harvested from Portugaliae Mathematica
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Publié le : 1951-01-01
EUDML-ID : urn:eudml:doc:114517 
@article{2013,
     author = {Halfar, Edwin},
     title = {A note on point-set operators},
     journal = {Portugaliae mathematica},
     volume = {10},
     year = {1951},
     pages = {103-104},
     zbl = {0043.32801},
     mrnumber = {0045191},
     language = {en},
     url = {http://dml.mathdoc.fr/item/2013}
}

Halfar, Edwin. A note on point-set operators. Portugaliae mathematica, Tome 10 (1951) pp. 103-104. http://gdmltest.u-ga.fr/item/2013/