@article{10474,
  author = {C. Corcoran and P. Langhoff},
  title = {Moment-theory approximations for nonnegative spectral densities},
  year = {1977},
  journal = {Journal of Mathematical Physics},
  volume = {18},
  pages = {651},
  month = {Jan-01-1977},
  issn = {00222488},
  url = {http://link.aip.org/link/JMAPAQ/v18/i4/p651/s1\&Agg=doi},
  doi = {10.1063/1.523321},
}