Polystyrene-Supported Zinc Bromide-Ethylenediamine Complex as a Reusable and Highly Efficient Heterogeneous Catalyst for the Synthesis of α,β-Acetylenic Ketones - Keivanloo, Ali; Bakherad, Mohammad; Bahramian, Bahram; Rahmani, Mahrokh; Taheri, Sayed Ali Naghi (Synthesis, 2011)