Xie, Yueqin, Xiaoping Yang, Liping Wang, and Juan Xu. 2012. “Comparison of Solvent Extraction and Static-Headspace Analysis for Determination of Cyanide in Cigarette Smoke by Gas Chromatography Electron Capture Detector”. Asian Journal of Chemistry 24 (8):3493-98. https://asianpubs.org/index.php/ajchem/article/view/9426.