@article{BMMS_2010_33_2_a14,
     author = {Sadik Keles and Selcen Y\"uksel Perktas and Erol Kili\c{c}},
     title = {Biharmonic {Curves} in {Lorentzian} {Para-Sasakian} {Manifolds}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2010},
     volume = {33},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2010_33_2_a14/}
}