A note on quasi umbilical hypersurface of a Sasakian manifold with   $(\phi, g, u, v, \lambda)-$ structure
  In this paper we have studied the properties of Quasi umbilical hypersurface $M$ of a Sasakian manifold $\tilde M$ with $(\phi, g, u, v, \lambda)-$structure and established the relation for $M$ to be cylindrical. 
Sachin Kumar Srivastava and Alok Kumar Srivastava
math.DG