List of Articles Perturbation theory Open Access Article Abstract Page Full-Text 1 - Fabrication of graded helical square tower-like Mn sculptured thin films and investigation of their electrical properties: comparison with perturbation theory Mahsa Fakharpour Hadi Savaloni 10.1007/s40094-017-0242-3 Open Access Article Abstract Page Full-Text 2 - Evaluation of the validity of the perturbation approximation for sound scattering in the sea using a Pierson - Moskowitz spectrum A. Mohseni Arasteh K. Lary M. Semnaninezhad Open Access Article Abstract Page Full-Text 3 - Electrical characterization of zig-zag Aluminum thin films using experimental and theoretical methods Mahsa Fakharpour Maryam Gholizadeh Arashti Mohammad Taghi Musazade Meybodi 10.30495/jopn.2021.27468.1218