%0 Journal Article %A U.C. De %A Absos Ali Shaikh %T Non-Existence of Proper Semi-Invariant Submanifolds of a Lorentzian Para-Sasakian Manifold %J Bulletin of the Malaysian Mathematical Society %D 1999 %V 22 %N 2 %U http://geodesic.mathdoc.fr/item/BMMS_1999_22_2_a7/ %F BMMS_1999_22_2_a7