In-service quality improvement activities [telecommunication products]. - Zenya Koono; Masakatsu Toiya; Tatsuo Matsuida; Masahiro Soga (IEEE J. Sel. Areas Commun., 1988)

Structural Way of Thinking as Applied to Quality Assurance Management. - Zenya Koono; Masahiro Soga (IEEE J. Sel. Areas Commun., 1990)