%0 Journal Article %T Sections of Serre fibrations with low-dimensional fibers %A N. Brodsky %A A. Chigogidze %A E. V. Shchepin %J Mathematics %D 2002 %I arXiv %X It was proved by H. Whitney in 1933 that it is possible to mark a point in all curves in a continuous way. The main result of this paper extends the Whitney theorem to dimensions 2 and 3. Namely, we prove that it is possible to choose a point continuously in all two-dimensional surfaces sufficiently close to a given surface, and in all 3-manifolds sufficiently close to a given 3-manifold. %U http://arxiv.org/abs/math/0208192v1