@article{d016,
    title     = "Hierarchies of beliefs and common knowledge",
    author    = "Brandenburger, Adam and Dekel, Eddie",
    journal   = "Journal of Economic Theory",
    volume    = "59",
    number    = "1",
    pages     = "189-198",
    year      = "1993",
    publisher = "Elsevier"
  }