@article{NSJOM_2010_40_2a_5,
     author = {Abhitosh Upadhyay, and Ram Shankar
 Gupta},
     title = {Lightlike hypersurfaces of indefinite cosymplectic
 manifolds with parallel symmetric bilinear forms},
     journal = {Novi Sad Journal of Mathematics},
     pages = {37-45},
     year = {2010},
     volume = {40},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2010_40_2a_5/}
}