Antoniazzi, E. M. M., and M. E. do C. Vinadé. “Spectrophotometric Method for L (+) Arginin, L (-) Asparagin and L (+) Lysin Determination in Pharmaceutical Drugs, With O-Diacetylbenzene”. Ciência E Natura, vol. 4, no. 4, Dec. 1982, pp. 37-48, doi:10.5902/2179460X24928.