%0 Journal Article %A P. A. Mozolyako %T On the definition of $B$-points %J Zapiski Nauchnykh Seminarov POMI %D 2008 %P 219-236 %V 355 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2008_355_a9/ %G ru %F ZNSL_2008_355_a9