@article{NSJOM_2005_35_1a_14,
     author = {A. Rashid},
     title = {Barotropic 

 vorticity equation},
     journal = {Novi Sad Journal of Mathematics},
     pages = {137-149},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2005_35_1a_14/}
}