List of Articles Seyyed Mohammad Ebrahimi Article 1 - PbWO4 nanoparticles: A robust and reusable heterogeneous catalyst for the synthesis of benzopyranopyridines under ultrasonic irradiation Hossein Shahbazi-Alavi Javad Safaei-Ghomi Ruhollah Talebi Iranian Journal of Catalysis , Issue 2 , Year , Spring 2017