Fe3O4@ZrO2/SO42‐: A recyclable magnetic heterogeneous nanocatalyst for synthesis of β‐amino carbonyl derivatives and synthesis of benzylamino coumarin derivatives through Mannich reaction - Ghafuri, Hossein; Ghorbani, Behnaz; Rashidizadeh, Afsaneh; Talebi, Majid; Roshani, Mahdi (Applied Organometallic Chemistry, 2018)