M. Rai, S. Jadhav, and M. Farooqui, “Sn-PILC: A novel Efficient and Recyclable Catalyst for One-pot Three Component Povarov’s Inverse-electron-demand Hetero Diels-Alder Reaction for a Facile Synthesis of Tetrahydropyranoquinoline Derivatives under Neat Conditions”, Orbital: Electron. J. Chem., vol. 8, no. 3, pp. 149-153, Jun. 2016.