"Y Sugahara,A Kazato,R Koganei,M Sampei,S Nakaura","Suppression of vertical bending and rigid-body-mode vibration in railway vehicle car body by primary and secondary suspension control: results of simulations and running tests using Shinkansen vehicle",,"Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit","Professional Engineering Publishing","Vol. 223","  F","pp. 517-531",2009,Nov.
"Yoshiki Sugahara,Tadao Takigami,Akihito Kazato,Reiko Koganei,Mitsuji Sampei","Suppression?of?Vertical?Vibration?in?Railway?Vehicles?by?Damping?Force?Control?of?Primary?Suspension?Using?an?LQG?Controller",,"Journal of System Design and Dynamics",,"Vol. 2","No. 1","pp. 251-262",2008,Mar.
"菅原能生,風戸昭人,富岡隆弘,小金井玲子,三平満司","１次および２次ばねの減衰制御を併用した鉄道車両の上下振動低減（現車走行試験結果）","日本機械学会 交通・物流部門講演会","日本機械学会 交通・物流部門講演会 論文集","日本機械学会",,,"pp. 219-222",2007,Dec.
"Yoshiki Sugahara,Tadao Takigami,Akihito Kazato,Reiko Koganei,Mitsuji Sampei","Improvement of Vertical Ride Comfort of Railway Vehicle by Primary Suspension Damping Force Control","12th Asia-Pacific Vibration Conference","Proceedings of the 12th Asia-Pacific Vibration Conference","The Japan Society of Mechanical Engineers",,,"pp. 1-9",2007,June