1. Vogel, V. I. 1951.A textbook of quantitative inorganic analysis—Theory and practice,, 2nd ed., 322–323. London: Longmans, Green and Co.
2. Ultraviolet Determination of Elemental Sulfur in Ore
3. Scott, R. L. 1965.Elemental Sulfur, Chemistry and Physics, Edited by: Meyer, M. 337–356. New York: Interscience. Chap. 17
4. The Heat Capacity of Sulfur from 25 to 450°, the Heats and Temperatures of Transition and Fusion1,2