@article{JMLR:v18:16-579,
  author  = {James Hensman and Nicolas Durrande and Arno Solin},
  title   = {Variational Fourier Features for Gaussian Processes},
  journal = {Journal of Machine Learning Research},
  year    = {2018},
  volume  = {18},
  number  = {151},
  pages   = {1-52},
  url     = {http://jmlr.org/papers/v18/16-579.html}
}