Tripathi, V.D. et al. 2019. Regioselective Three Component Domino Synthesis of Polyhydrospiro[indoline-3,3’-pyrrolizine]-2-one via [3+2] Cycloaddition Reaction. Asian Journal of Chemistry. 31, 3 (Jan. 2019), 613–616. DOI:https://doi.org/10.14233/ajchem.2019.21737.