Soliton solutions and interactions of the Zakharov-Kuznetsov equation in the electron-positron-ion plasmasQi-Xing Qu, Bo Tian, Wen-Jun Liu, Kun Sun, Pan Wang, Yan Jiang and Bo QinEur. Phys. J. D, 61 3 (2011) 709-715DOI: https://doi.org/10.1140/epjd/e2010-10342-5