%0 Journal Article %A N. V. Talantova %A A. P. Shirokov %T Three-step groups of linear fractional substitutions of a dual variable as affine collineations %J Trudy Geometricheskogo Seminara %D 1976 %P 105-113 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUTGS_1976_9_a12/ %G ru %F KUTGS_1976_9_a12