Perktas, Selcen Yüksel, Erol Kiliç, and Sadik Keles. “Hypersurfaces of Lorentzian Para-Sasakian Manifolds”. MATHEMATICA SCANDINAVICA 109, no. 1 (September 1, 2011): 5–21. Accessed November 21, 2024. https://www.mscand.dk/article/view/15174.