@article{JMLR:v20:18-659,
  author  = {Yousra El-Bachir and Anthony C.  Davison},
  title   = {Fast Automatic Smoothing for Generalized Additive Models},
  journal = {Journal of Machine Learning Research},
  year    = {2019},
  volume  = {20},
  number  = {173},
  pages   = {1--27},
  url     = {http://jmlr.org/papers/v20/18-659.html}
}