List of Articles Partial Differential Equation Open Access Article Abstract Page Full-Text 1 - LIE SYMMETRIES, SELF-ADJOINTNESS, AND CONSERVATION LAWS OF THE MONG-AMPERE EQUATION Zahra Momennezhad Mahdi Najafikhah Open Access Article Abstract Page Full-Text 2 - Solving Nonlinear Klein-Gordon Equation with a Quadratic Nonlinear term using Homotopy Analysis Method H. Jafari M. Saeidy M. Arab Firoozjaee Open Access Article Abstract Page Full-Text 3 - Application of Exp-function method to the (2 + 1)-dimensional Calogero Bogoyavlanskii Schiff equation. Z. Ayati J. Biazar