%0 Journal Article %A I. V. Dolgachev %T The Euler characteristic of a~family of algebraic varieties %J Sbornik. Mathematics %D 1972 %P 303-319 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1972_18_2_a9/ %G en %F SM_1972_18_2_a9