@article{105143, author = {Zden\v ek Frol\'\i k}, title = {Non-homogeneity of $\beta P-P$}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {008}, year = {1967}, pages = {705-709}, zbl = {0163.44601}, mrnumber = {0266160}, language = {en}, url = {http://dml.mathdoc.fr/item/105143} }
Frolík, Zdeněk. Non-homogeneity of $\beta P-P$. Commentationes Mathematicae Universitatis Carolinae, Tome 008 (1967) pp. 705-709. http://gdmltest.u-ga.fr/item/105143/
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