@article{NSJOM_2010_40_2a_3,
     author = {R. N. Singh, and M. K. Pandey, and D. Gautam},
     title = {On
 $\mathbf{N(k)-}$quasi {Einstein} manifold},
     journal = {Novi Sad Journal of Mathematics},
     pages = {23-28},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2010_40_2a_3/}
}