1. M. A. Akivis, ?Conformal-differential geometry,? in:Geometry. 1963 [in Russian], Itogi Nauki VINITI Akad. Nauk SSSR, Moscow (1965), pp. 108?137.
2. V. Alda, ?Isometric transformations of a family of hypersurfaces,? Czechoslovak. Math. J.,6, No. 2, 195?211 (1956).
3. N. V. Amisheva, ?On one class of complexes of conics in an equiaffine space,? Third Baltic Geom. Conf., Abstr. of Reports [in Russian], Palanga (1968), pp. 6?9.
4. B. A. Andreev, ?On one class of differentiable maps of spaces of pairs of figures into point spaces,? Differential Geometry of Manifolds of Figures (Proc. Kaliningrad Univ.) [in Russian], Vol. 1 (1970), pp. 47?54.
5. B. A. Andreev, ?On the differential geometry of correspondences between a space of pairs (p, q) and a point space,? Differential Geometry of Manifolds of Figures (Proc. Kaliningrad Univ.) [in Russian], Vol. 2 (1971), pp. 28?37.