Solvent-free Diels-Alder reactions catalyzed by `FE´`CL IND. 3´ on Aerosil® silica - Donatoni, Maria C; Junior, Gilmar A. B; Oliveira, Kleber T. de; Ando, Rômulo Augusto; Brocksom, Timothy John; Santos, Alcindo Aparecido dos (Tetrahedron, 2014)