MathSciNet bibliographic data MR457731 30A72 Zajíček, Luděk Sets of $\sigma$$\sigma$-porosity and sets of $\sigma$$\sigma$-porosity $(q)$$(q)$. Časopis Pěst. Mat. 101 (1976), no. 4, 350–359. Links to the journal or article are not yet available

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