@article{JMLR:v20:18-213,
  author  = {Felix Berkenkamp and Angela P. Schoellig and Andreas Krause},
  title   = {No-Regret Bayesian Optimization with Unknown Hyperparameters},
  journal = {Journal of Machine Learning Research},
  year    = {2019},
  volume  = {20},
  number  = {50},
  pages   = {1--24},
  url     = {http://jmlr.org/papers/v20/18-213.html}
}