Supriya, S., and A. Raghavan. “Synthesis and Characterization of Mannich Aminomethylation Products of Metal(alaninato) Complexes Using 1-Nitropropane As Carbon Acid”. Asian Journal of Chemistry, vol. 27, no. 10, June 2015, pp. 3821-5, doi:10.14233/ajchem.2015.18998.