Shugailo, E. A. “Parallel Affine Immersions ${M^n}\to {{\mathbb{R}}^{n+2 }}$ With Flat Connection”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 9 (September 25, 2013): 1283–1300. Accessed April 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2509.