An Inquiry into Small Group Activity with Team-management: SYMLOG as a Measuring Method of Team Performance. Wako Keizai: The Bulletin of the Faculty of Economics, Wako University. 2005. Vol.37 No.2
Perspectives of Shared Leadership: The Functions of Co-Leader in the Executive Team. Wako Keizai: The Bulletin of The Faculty of Economics, Wako University. 2004. Vol.37 No.1