CD playback using a monolithic confocal laser coupler with a confocal knife edge (CKE) structure. - Takeshi Mizuno; Masato Doi; Yoshinobu Higuchi; Hironobu Narui; Osamu Matsuda (IEEE Trans. Consumer Electron., 1999)

Analysis of Time-Dependent Query Trends in P2P File Sharing Systems. - Masato Doi; Shingo Ata; Ikuo Oka (APNOMS, 2009)