Ganchev, Georgi, and Vesselka Mihova. “A CLASSIFICATION OF CONFORMALLY FLAT RIEMANNIAN MANIFOLDS LOCALLY ISOMETRIC TO HYPERSURFACES IN EUCLIDEAN OR MINKOWSKI SPACE”. Ann. Sofia Univ. Fac. Math. and Inf. 102 (December 12, 2015): 109–132. Accessed November 24, 2024. https://ftl5.uni-sofia.bg./index.php/fmi/article/view/66.