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@article{10_4064_cm_20_1_23_26, author = {B. W\k{e}glorz}, title = {Some preservation theorems {(II)}}, journal = {Colloquium Mathematicum}, pages = {23--26}, publisher = {mathdoc}, volume = {20}, number = {1}, year = {1969}, doi = {10.4064/cm-20-1-23-26}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-20-1-23-26/} }
B. Węglorz. Some preservation theorems (II). Colloquium Mathematicum, Tome 20 (1969) no. 1, pp. 23-26. doi : 10.4064/cm-20-1-23-26. http://geodesic.mathdoc.fr/articles/10.4064/cm-20-1-23-26/
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