Jun-ichi Nishizawa, Tetsuo Sasaki, Ken Suto, Masahiko Ito, Takashi Yoshida, Tadao Tanabe “High-resolution GaP Terahertz Spectrometer and Its Application to Detect Defects in Gamma-irradiated Glucose Crystal” International Journal of Infrared and Millimeter Waves, 29 (2008), 291-297.