Shuhaylo, O. “Affine Curvature of Plane Geodesic Lines on Affine Hypersurfaces”. Ukrains’kyi Matematychnyi Zhurnal 69, no. 4 (April 25, 2017): 565–574. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/1716.