High-bit-rate, high-input-sensitivity decision circuit using Si bipolar technology. - Kiyoshi Ishii; Haruhiko Ichino; Yoshiji Kobayashi; Chikara Yamaguchi (IEEE J. Solid State Circuits, 1994)

Maximum operating frequency in Si bipolar master-slave toggle flip-flop circuit. - Kiyoshi Ishii; Haruhiko Ichino; Chikara Yamaguchi (IEEE J. Solid State Circuits, 1994)

Very-high-speed Si bipolar static frequency dividers with new T-type flip-flops. - Kiyoshi Ishii; Haruhiko Ichino; Minoru Togashi; Yoshiji Kobayashi; Chikara Yamaguchi (IEEE J. Solid State Circuits, 1995)

Highly integrated three-dimensional MMIC technology applied to novel masterslice GaAs- and Si-MMICs. - Tsuneo Tokumitsu; Makoto Hirano; Kimiyoshi Yamasaki; Chikara Yamaguchi; Kenjiro Nishikawa; Masayoshi Aikawa (IEEE J. Solid State Circuits, 1997)

Overlapping Climate Clubs: Self-Enforcing R&D Networks to Mitigate Global Warming. - Emilson Caputo Delfino Silva; Chikara Yamaguchi (Games, 2022)