@InProceedings{Shahriari2016Unbounded,
  author = {Bobak Shahriari and Alexandre Bouchard-C\^{o}t\'{e} and Nando de Freitas},
  title = {Unbounded {B}ayesian optimization via regularization},
  booktitle = {AISTATS},
  volume = {19},
  pages = {1168--1176},
  year = {2016}
}