%0 Journal Article %A V. S. Bolodurin %T Some projective-differential properties of point correspondences of four straight lines %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1983 %P 27-35 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1983_1_a2/ %G ru %F IVM_1983_1_a2