Srinivasa Ragam, Tadao Tanabe, Yutaka Oyama, Kenta Watanabe, Hikari Dezaki “Comparison of CW THz Wave Spectrometer with Laser Diode Excitation and Pulsed THz Wave Spectrometer with Cr:forsterite Sources Based on Difference Frequency Generation of Near-infrared Lasers in GaP” Journal of Infrared, Millimeter, and Terahertz Waves, 31 (2010), 1164-1170.