List of Articles Runge–Kutta method Open Access Article Abstract Page Full-Text 1 - Analytical study of nonlinear oscillatory systems using the Hamiltonian approach technique Martin Hermann Masoud Saravi Hadi Ebrahimi Khah 10.1007/s40094-014-0133-9 Open Access Article Abstract Page Full-Text 2 - Approximate Solution of the Second Order Initial Value Problem by Using Epsilon Modified Block-Pulse Function Mahnaz Mohammadi Alireza Vahidi Saeid Khezerloo