List of Articles Laplace transformation Open Access Article Abstract Page Full-Text 1 - Semi-analytical Method to Solve the Non-linear System of Equations to Model of Evolution for Smoking Habit in Spain S. Noeiaghdam K. Kamal Ali Open Access Article Abstract Page Full-Text 2 - Modified homotopy perturbation method for solving non-linear oscillator's equations A. R. Vahidi Z. Azimzadeh M. Shahrestani‎