List of Articles 1H-phenanthro[9 Open Access Article Abstract Page Full-Text 1 - Sulfuric acid immobilized on silica: A versatile and reusable heterogeneous catalyst for the synthesis of phenanthrimidazole derivatives Hossein Behmadi Seyed Mahdi Saadati Mina Roshani Hasan Mohammadi Abbas Razavi Marjan Ramezani