Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) S. Ohnoya and Y. Yamano and M. Okada,Reduction of void discharges in materials with additive of Azo-compounds,Proceedings of 1998 International Symposium on Electrical Insulating Materials. 1998 Asian International Conference on Dielectrics and Electrical Insulation. 30th Symposium on Electrical Insulating Materials (IEEE Cat. No.98TH8286),,Inst. Electr. Eng. Japan,2002-11-27,,,219-222,https://cir.nii.ac.jp/crid/1874242817349808512,https://doi.org/10.1109/iseim.1998.741724