___

• [1] Blaschke, W., Affine Differentialgeometrie, Berlin, 1923.
• [2] Salkovski, E., Affine Differentialgeometrie, W. De Gruyter, Berlin, 1934.
• [3] Schirokov, P.A. & Schirokov, A. P., Affine Differentialgeometrie, Teubner, Leipzig, 1962.
• [4] Li, A.M., Simon, U., Zhao, G., Global Affine Differential Geometry of Hypersurfaces, Walter de Gruyter, Berlin, New York, 1993.
• [5] Nomizu, K. & Sasaki, T., Affine Differential Geometry: Geometry of Affine Immersions, Cambridge Univ. Press, 1994.
• [6] Simon, U., Recent developments in afine differential geometry, Diff. Geo. And its App., Proc. Conf. Dubrovnik, Yugosl. (1988), 327-347.
• [7] Khadjiev, Dj., An Application of the Invariant Theory to Differential Geometry (Rus- sian),Fan, Tashkent, 1988.
• [8] Khadjiev, Dj. & Pek¸sen, O¨ ., The complete system of global differential and integral invariants for equi-affine curves, Dif. Geo. and its App. 20, (2004), 167-175.
• [9] Pek¸sen, O¨ . & Khadjiev, Dj., On invariants of curves in centro-affine geometry, J. Math. Kyoto Univ. 44-3, (2004), 603-613.
• [10] Monge, G., Application de l’analyse a’la geometrie, Paris, 1807 at 1809.
• [11] Mayer, O., Geometrie centro-affine diferentielle des surfaces, Ann. Sci. Univ., Jassy, 21, (1934), 1-77.
• [12] Magazinnikov, L.I., Centro-affine theory of ruled surfaces (Russian), Trudy Tomsk. Gos. Univ. Ser. Meh.-Mat. Geom. Sb. 161, (1962), 101–110.
• [13] Katou, M., Center maps of afine minimal ruled hypersurfaces, Interdisiplinary Information Sciences, 12-1, (2006), 53-56.