Veeraswamy, S. et al. 2015. Facile and Short Synthesis of (±) 1-Hydroxy Indolizidine and (±) Coniceine from Picolinic Acid Ethyl Ester via Cross Claisen Condensation. Asian Journal of Chemistry. 27, 5 (Feb. 2015), 1667–1670. DOI:https://doi.org/10.14233/ajchem.2015.17459.