@misc{1169036,
  author = {Helmut Wielandt},
  title = {Error bounds for eigenvalues of symmetric integral equations:},
  year = {1953},
  month = {1953-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.RPT.2831},
  language = {en},
}