On totally umbilical submanifolds of manifolds with certain recurrent condition imposed on the curvature tensor. Ewert-Krzemieniewski, Stanisław (1994) Mathematica Pannonica
On Weyl pseudosymmetric hypersurfaces Kadri Arslan, Ryszard Deszcz, Şahnur Yaprak (1997) Colloquium Mathematicae
One parameter Lorentzian motions in Lorentz 3-space Mehmet Ali Gungor, Murat Tosun (2008) Kragujevac Journal of Mathematics