@misc{indiciae52f27ed202b8,
  title = {Spurious singularities in the Schwinger variational method.},
  author = {C Winstead and V McKoy},
  year = {1990},
  doi = {10.1103/physreva.41.49},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902839/},
  note = {Source identifier: 9902839}
}