%0 Journal Article %A E. I. Bunina %A V. K. Zakharov %T Formula-inaccessible cardinals and a characterization of all natural models of~Zermelo--Fraenkel set theory %J Izvestiya. Mathematics %D 2007 %P 219-245 %V 71 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2007_71_2_a0/ %G en %F IM2_2007_71_2_a0