@article{11441,
  author = {Ludwig Oster},
  title = {New Restriction on Models for Quasistellar Objects},
  year = {1968},
  journal = {Nature},
  volume = {217},
  pages = {148-149},
  month = {Jan-01-1969},
  issn = {0028-0836},
  doi = {10.1038/217148a0},
}