@article{BSMF_1980__108__113_0, author = {Piotrowski, Zbigniew}, title = {Continuity points in $\lbrace x\rbrace \times Y$}, journal = {Bulletin de la Soci\'et\'e Math\'ematique de France}, volume = {108}, year = {1980}, pages = {113-115}, doi = {10.24033/bsmf.1911}, mrnumber = {82m:54007}, zbl = {0439.54013}, language = {en}, url = {http://dml.mathdoc.fr/item/BSMF_1980__108__113_0} }
Piotrowski, Zbigniew. Continuity points in $\lbrace x\rbrace \times Y$. Bulletin de la Société Mathématique de France, Tome 108 (1980) pp. 113-115. doi : 10.24033/bsmf.1911. http://gdmltest.u-ga.fr/item/BSMF_1980__108__113_0/
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