A CLASSIFICATION OF CONFORMALLY FLAT RIEMANNIAN MANIFOLDS LOCALLY ISOMETRIC TO HYPERSURFACES IN EUCLIDEAN OR MINKOWSKI SPACE. Ann. Sofia Univ. Fac. Math. and Inf. 2015;102:109-132. Accessed January 11, 2026. https://annual.uni-sofia.bg/index.php/fmi/article/view/66