Raju, N.M. et al. 2016. Synthesis of 4-Chloro-5,6-dihydro-2H-pyran Derivatives by NbCl5 Mediated Cyclization of Epoxides with Homopropargylic Alcohols. Asian Journal of Chemistry. 29, 3 (Dec. 2016), 614–616. DOI:https://doi.org/10.14233/ajchem.2017.20277.