@article{weko_59926_1,
   author	 = "Yasuhiko,Ikebe and Toshiyuki,Inagaki and Sadaaki,Miyamoto",
   title	 = "Perturbation Theorems for Matrix Eigenvalues",
   journal	 = "Journal of Information Processing ",
   year 	 = "1983",
   volume	 = "6",
   number	 = "2",
   pages	 = "92--94",
   month	 = "jul"
}