Bh, S., and V. Kasana. “Synthesis and Herbicidal Activity of 4-Benzylidene-2-Phenyl Oxazol-5(4H)-One Derivatives Using L-Proline As Catalyst”. Asian Journal of Chemistry, vol. 30, no. 8, June 2018, pp. 1717-22, doi:10.14233/ajchem.2018.21251.