@article{decarvalho2012d,
  title = {Tracking the {{US}} business cycle with a singular spectrum analysis},
  volume = {114},
  number = {1},
  journal = {Economics Letters},
  author = {{de Carvalho}, Miguel and Rodrigues, Paulo C. and Rua, Ant{\'o}nio},
  year = {2012},
  pages = {32--35}
}