1. H.Y. Sohn, “The Coming-of-Age of Process Engineering in Extractive Metallurgy,” Met. Trans. B, 22B (1991), pp. 737–754.
2. B.S. Chun, C.W. Won, and H.Y. Sahn, “Chemical Vapor Deposition Kinetics of Tungsten from WCl6, onto Nickel Plate at Elevated Temperatures,. Met. Trans. B, 22B (1991), pp. 560–563.
3. D. Zhu and Y. Sahai, “Modeling Chemical Vapor Deposition of Silicon with Local Equilibrium Consideration at the Substrate,” Met. Trans. B, 22B (1991), pp. 309–321.
4. D. Zhu and Y. Sahai, “Three-Dimensional Mathematical Model for Transport Phenomena in Horizontal Chemical Vapor Deposition Reactors,” Met. Trans. B, 22B (1991), pp. 811–822.
5. H. Yu et al., “Production of Ultrapure Tungsten by Solvent Extraction and Electron-Beam Zone Refining,” Refractory Metals: Extraction, Processing and Applications, eds. K.C. Liddell, D.R. Sadoway, and R.G. Bautista (Warrendale, PA: TMS, 1990), pp. 117–128.