@article{JMLR:v22:19-892,
  author  = {Lin Liu and Rajarshi Mukherjee and James M. Robins and Eric Tchetgen Tchetgen},
  title   = {Adaptive estimation of nonparametric functionals},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {99},
  pages   = {1--66},
  url     = {http://jmlr.org/papers/v22/19-892.html}
}