2) Katsumasa Suzuki, Yoshitaka Niimura, Kazutoshi Akitani, Ken Sugimura : Energy Saving of Oil Hydraulic Pump Unit by Idling Stop Method Using an Accumulator, 10th International Conference on Fluid Control, Measurements, and Visualization, Moscow Russia (2009)
3) Ken Sugimura, Katsumasa Suzuki : Energy Saving of Oil Hydraulic Pump Unit by Idling Stop Using an Accumulator, 7th International Fluid Power Conference, Aachen Germany (2010)
4) Ken Sugimura, Katsumasa Suzuki, Shinpei Ota, Teturou Doi : Energy Saving of Oil Hydraulic Pump Unit by Idling Stop Using an Accumulator, 12th Scandinavian International Conference on Fluid Power, Tampere Finland (2011)