Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) OEDA Kazuo,Approximation of Obstacles by High Potentials; Convergence of Eigenvalues,Proceedings of the Japan Academy,0021-4280,The Japan Academy,1970,46,7,663-667,https://cir.nii.ac.jp/crid/1390001205111769216,https://doi.org/10.3792/pja/1195520228