Nguyễn Tiến, D., N. T. Thị Thu, and L. Đoàn Thị Thúy. “Quick Test on Methanol in Petrol by Acid Chromotropic”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 56, no. 1, May 2019, pp. 13-25, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4828.