Nanocrystalline titania-based sulfonic acid (TiO2-Pr-SO3H) as a new, highly efficient, and recyclable solid acid catalyst for preparation of quinoxaline derivatives Seyyed Vahid Atghia*, Somayyeh Sarvi Beigbaghlou, 10.1186/2193-8865-3-38 XML Requires Subscription HTML Requires Subscription PDF views: 114 downloads: 128