%0 Journal Article %T Dense families of selections and finite-dimensional spaces %A V. Gutev %A V. Valov %J Mathematics %D 2001 %I arXiv %X A characterization of $n$-dimensional spaces via continuous selections avoiding $Z_n$-sets is given, and a selection theorem for strongly countable-dimensional spaces is established. We apply these results to prove a generalized Ostrand's theorem and to obtain a new alternative proof of the Hurewicz formula. %U http://arxiv.org/abs/math/0111254v1