S. U. Kamath, B. Pemiah, R. K. Sekar, S. Krishnaswamy, S. Sethuraman, and U. Maheswari Krishnan, “Role of Purifying Agents in Chemical Transformation of Sulphur: An Ayurvedic Perspective”, ajc, vol. 26, no. 12, pp. 3697–3699, Jun. 2014.