Organocatalyzed Reactions Involving 3-Formylchromones and Acetylenedicarboxylates: Efficient Synthesis of Functionalized Benzophenones and Polysubstituted Xanthones - Terzidis, Michael A.; Tsiaras, Vassilios G.; Stephanidou-Stephanatou, Julia; Tsoleridis, Constantinos A. (Synthesis, 2011)