Rohi, M., Sadeghi, B. and Moslemin, M. 2015. Synthesis of spirooxindoles with three component reaction between β-ketoesters, malononitrile and isatin derivatives in the presence of Alum.SiO2 nanoparticles as a new nano catalyst. Ciência e Natura. 37, (Dec. 2015), 80–85. DOI:https://doi.org/10.5902/2179460X20834.