%0 Journal Article %A V. A. Iskovskikh %T Double projection from a~line on Fano threefolds of the first kind %J Sbornik. Mathematics %D 1990 %P 265-284 %V 66 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1990_66_1_a14/ %G en %F SM_1990_66_1_a14