"Mitsumasa Okada,Katsunori Yamaoka,Yoshinori Sakai","Single-Fiber Access/Metro WDM Ring Architecture for",,"Journal of Lightwave Technoloogy",,"Vol. 27","  9","pp. 1181-1196",2009,May
"Tetsuji Okuda,Phengxay Deevanhxay,Wataru Nishijima,Takao Hasegawa,Mitsumasa Okada","Enhancement of Cryptosporidium oocyst removal by coagulation and sedimentation with poly-silicate iron (PSI)",,"Journal of Chemical Engineering of Japan",,"Volume 39","No. 2","Page 137-143",2006,Feb.
"Tetsuji Okuda,Wataru Nishijima,Phengxay Deevanhxay,Mitsumasa Okada,Takao Hasegawa","Improvement of sedimentation by the coagulation using poly-silicate iron for the removal of Cryptosporidium oocyst",,"Separation Science and Technology","TAYLOR & FRANCIS INC","Vol. 41","No. 15","Page 3387-3396",2006,
"J. Wang,P. Deevanhxay,T. Hasegawa,Y. Ehara,M. Kurokawa,K. Hashimoto,W. Nishijima,M. Okada","A pilot plant study of polysilicato-iron coagulant",,"Water Supply","IWA Publishing","Vol. 2","No. 2","pp. 107-113",2002,Feb.