@article{JMLR:v20:17-547,
  author  = {Steffen Gr{{\"u}}new{{\"a}}lder and Azadeh Khaleghi},
  title   = {Approximations of the Restless Bandit Problem},
  journal = {Journal of Machine Learning Research},
  year    = {2019},
  volume  = {20},
  number  = {14},
  pages   = {1--37},
  url     = {http://jmlr.org/papers/v20/17-547.html}
}