Khuhawar, M.Y., et al. “Capillary Gas Chromatographic Determination of Isoniazid in Pharmaceutical Preparation by Pre-Column Derivatization With Acetylacetone”. Asian Journal of Chemistry, vol. 20, no. 8, Mar. 2010, pp. 5997-06, https://asianpubs.org/index.php/ajchem/article/view/13048.