Liaquat Ali Zardari, et al., translators. “Capillary Gas Chromatographic Determination of Gamma Aminobutyric Acid and Putrescine in Cerebrospinal Fluidusing Trifluoroacetylacetone As Derivatizing Reagent”. Pakistan Journal of Analytical & Environmental Chemistry, vol. 19, no. 1, June 2018, pp. 28 – 35, https://doi.org/10.21743/pjaec/2018.06.02.