Kiyoshi Yoshida, Koichiro Sawa, Kenji Suzuki. Influence of Sealed Gas and its Pressure on Arc Discharge in Electromagnetic Contactor. 63rd IEEE Holm Conference on Electrical Contacts. 2017. 239-244
Kiyoshi Yoshida. A study of electrical contacts for high voltage and large current under DC power supply in smart community(Researches and Overseas Activities). 2017. 46. 4. 47-48