@ARTICLE{
author={Saleem H,Haque Q,Vranjes Jovo},
year={2003},
title={Nonlinear drift waves in electron-positron-ion plasmas},
journal={PHYSICAL REVIEW E},
volume={67},
number={5},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Haque Q,Saleem H,Vranjes Jovo},
year={2002},
title={Electromagnetic vortices in electron-positron-ion plasmas with shear flow},
journal={PHYSICS OF PLASMAS},
volume={9},
number={2},
pages={474-479},
document_type={Article},
}