Jun-ichi Nishizawa, Tetsuo Sasaki, Ken Suto, Tetsuya Yamada, Tadao Tanabe, Takenori Tanno, Takashi Sawai, Yasuhiko Miura “THz imaging of nucleobases and cancerous tissue using a GaP THz-wave generator” Optics Communications, 244 (2005), 469-474.