"AKIHITO SUZUKI,Ratu Ulfiati,MASABUMI MASUKO","Evaluation of antioxidants in rapeseed oils for railway application",,"Tribology International","Elsevier","Vol. 42",,"pp. 987?994",2009,June
"Akihito Suzuki,Ratu Ulfiati,MASABUMI MASUKO","Development and Evaluation of Biodegradable Lubricants for Railways","Regional Symposium on Chemical Engineering 2005","RSCE 2005 Proceedings",,"Vol. 5",,"pp. 205-209",2005,Nov.
"Akihito Suzuki,Ratu Ulfiati,MASABUMI MASUKO","UV-assisted-degradation of biodegradable base oil and effect on the tribological performance (Part II)","JAST Tribology Conference Tokyo, May 2003","Proceedings of JAST Tribology Conference Tokyo, May 2003","Japanese Society of Tribologists",,,"pp. 241-242",2003,May
"Ratu Ulfiati,A. Suzuki,MASABUMI MASUKO","UV-assisted-degradation of Biodegradable Base Oil and Effect on The Tribological Performance","JAST Tribology Conference Sendai, October 2002","Proceedings of JAST Tribology Conference Sendai, October 2002",,,,"pp. 383-384",2002,Oct.