List of Articles Energy balance method Open Access Article Abstract Page Full-Text 1 - Determination of the amplitude-frequency for strongly nonlinear oscillator by two approximate analytical techniques Amir Ayazi Hadi Ebrahimi Khah 10.1186/2251-7235-7-38 Open Access Article Abstract Page Full-Text 2 - استفاده از روش تجزیه Adomian و روش تکرار متغیر برای مشکلات سیستم پویا Babatunde Yisa