Pressure anisotropy effects on nonlinear electrostatic excitations in magnetized electron-positron-ion plasmasMuhammad Adnan, Gina Williams, Anisa Qamar, Shahzad Mahmood and Ioannis KourakisEur. Phys. J. D, 68 9 (2014) 247DOI: https://doi.org/10.1140/epjd/e2014-50384-y