فهرست مقالات 4th order sturm-liouville differential equation دسترسی آزاد مقاله صفحه چکیده متن کامل 1 - A Mathematical Formulation to Estimate the Fundamental Period of High-Rise Buildings Including Flexural-Shear Behavior and Structural Interaction E Noroozinejad Farsangi H Melatdoust A Bin Adnan