Muralikrishna, D., et al. “Synthesis of Cefdinir from 7-Amino-3-Vinyl Cephem-4-Carboxylic Acid Using N-Methyl Morpholine As Base”. Asian Journal of Chemistry, vol. 21, no. 1, Mar. 2010, pp. 820-2, https://asianpubs.org/index.php/ajchem/article/view/18994.