"The Effect of Milling Time and Grinding Media Upon the Particle Size Distribution for LAST (Lead-Antimony-Silver-Telliurm) Powers," Pilchak, AL, Ren, F., Case, ED, Timm, EJ, Schock, HJ., Philos. Mag. A. (2007).
"Youngs Modulus of N-Type Last Thermoelectric Material Determined from Knoop Indention," Ren, F., Case, ED, Hall, BD, Timm, EJ, Schock, HJ, Chemistry of Physics and Materials (2007).
"Hardness as a Function of Composition for N-Type Last Thermoelectric Material," Ren, F., Case, E.D., Timm, E.J., Schock, H.J., Applied Physics Letters (2007).