Copper-Free Sonogashira Reaction Using Gold Nanoparticles Supported on Ce2O3, Nb2O5 and SiO2 under Microwave Irradiation - de Souza, Rodrigo O. M. A.; Bittar, Mariana S.; Mendes, Laiza V. P.; da Silva, Carla Michele F.; da Silva, Victor Teixeira; Antunes, O. A. C. (Synlett, 2008)